E-Bike Class 4: Speed, Laws, Power & Safety Guide

E-Bike Class 4

"Class 4" is not an official legal category under the standard U.S. federal or state e-bike classification system.

The U.S. legal framework formally recognizes only three classes:

• Class 1: Pedal-assist only, motor cuts off at 20 mph, ≤750W.
• Class 2: Throttle-assisted (with pedals), motor cuts off at 20 mph, ≤750W.
• Class 3: Pedal-assist only (some states allow throttle up to 20 mph), motor cuts off at 28 mph, ≤750W.

What People Call "Class 4"

In the e-bike industry and enthusiast communities, "Class 4" is an informal label used for high-powered electric two-wheelers that exceed the legal limits of Class 1–3.

Feature	Legal Standard (Class 1–3)	Informal "Class 4"
Max Motor Power	Capped at 750W (1 hp continuous)	1,000W to 6,000W+
Assisted Top Speed	Capped at 20–28 mph	30 mph to 60+ mph
Throttle Behavior	Capped at 20 mph (if equipped)	Unrestricted throttle up to top speed
Common Examples	Trek, Specialized, Rad Power, Aventon	Sur-Ron, Talaria, Super73 (R-series off-road mode), Delfast

Legal Status & Riding Restrictions

Because these bikes exceed 750W or 28 mph, they forfeit legal bicycle status in nearly all U.S. jurisdictions.

1. No Bike Lanes or Multi-Use Paths

They are strictly prohibited on pedestrian paths, standard bike lanes, and non-motorized public trails.

2. Reclassified by the DMV

In the eyes of local traffic law, they fall into moped, motor-driven cycle, or motorcycle categories.

3. Street Legality Requirements

To legally ride on public streets, most states require:

• A valid driver's or motorcycle license
• Vehicle registration and license plate
• Minimum liability insurance
• DOT-compliant equipment, including turn signals, brake lights, mirrors, horn, DOT-approved tires, and helmet

4. Private Property & OHV Parks

Without registration or street hardware, they can legally be operated only on private land, closed tracks, or OHV (Off-Highway Vehicle) trails that permit motorized dirt bikes.

Class 4 E-Bike Laws

Under federal law and standard state vehicle codes in the United States, there is no legal designation called "Class 4" for an electric bicycle.

The legal e-bike framework caps out at three classes:

• Class 1: Pedal-assist only, motor cuts off at 20 mph, ≤750W.
• Class 2: Throttle-assisted, motor cuts off at 20 mph, ≤750W.
• Class 3: Pedal-assist only (or throttle limited to 20 mph depending on the state), motor cuts off at 28 mph, ≤750W.

What Is Marketed as a "Class 4" E-Bike?

In the direct-to-consumer and enthusiast markets, manufacturers and retailers use the informal marketing label "Class 4" or "Out-of-Class Electric Vehicle" (OCEV) to describe two-wheelers that exceed the legal limits of standard e-bikes.

Typically, these vehicles have:

• Motors exceeding 750 watts (e.g., 1,000W to 5,000W+)
• Motor-assisted speeds exceeding 28 mph (often reaching 30 to 50+ mph)
• Full throttle operation above 20 mph

How the Law Actually Treats "Class 4" Vehicles

Because they fall outside the statutory definition of an e-bike, they lose all legal bicycle privileges. State Departments of Motor Vehicles (DMVs) and law enforcement treat them as motor vehicles—usually categorized as mopeds, motor-driven cycles, or electric motorcycles (e-motos).

Requirement	Standard E-Bikes (Classes 1–3)	"Class 4" / Out-of-Class Vehicles
Legal Classification	Bicycle	Moped, motorized bicycle, or motorcycle
Bike Paths & Multi-Use Trails	Allowed (subject to local rules)	Strictly prohibited
Sidewalks	Varies locally	Strictly prohibited
Driver's License	None required	Usually required (standard or motorcycle/M-class)
Vehicle Registration & License Plate	Not required	Required for public road use
Liability Insurance	Not required	Typically required for road use
Safety Equipment	Bicycle helmet laws apply	DOT-approved helmet, mirrors, turn signals, horn, and brake lights

Key Legal Risks & Practical Realities

The "Off-Road Use Only" Loophole

Manufacturers frequently sell these bikes with a disclaimer stating they are for "private property or off-road use only." The moment the vehicle enters a public street, bike lane, or public park, the rider is subject to motor vehicle statutes.

Registration Catch-22

Many "Class 4" bikes cannot actually be registered for street use because they lack a 17-digit Vehicle Identification Number (VIN), a Manufacturer's Certificate of Origin (MCO), and DOT-compliant equipment such as mirrors, headlights, and turn signals.

This leaves them in an illegal gray zone where they cannot be legally ridden on bike trails or on public roads.

Enforcement & Liability

Operating an unregistered motor vehicle on public roads or paths carries penalties including vehicle impoundment, fines for operating an unregistered or uninsured motor vehicle, and driving without a valid license.

In the event of a collision, standard bicycle or homeowner liability insurance will generally deny coverage.

Class 4 E-Bike Speed

A "Class 4" e-bike is an unofficial industry category for high-powered electric bikes that exceed 28 mph (45 km/h), typically reaching speeds between 30 mph and 60+ mph (48–96+ km/h).

Standard E-Bike Classes vs. "Class 4"

Category	Motor Limit	Throttle / Assist	Top Motor-Assisted Speed	Legal Classification
Class 1	≤750W	Pedal-assist only	20 mph (32 km/h)	Standard e-bike
Class 2	≤750W	Throttle & pedal-assist	20 mph (32 km/h)	Standard e-bike
Class 3	≤750W	Pedal-assist (some throttles to 20 mph)	28 mph (45 km/h)	Standard e-bike
"Class 4"	Often 1,000W–6,000W+	Throttle & pedal-assist	28 to 60+ mph (45–100 km/h)	Moped / Motorized Cycle / Motorcycle

Key Legal & Practical Notes

Not Legally a Standard Bicycle

In the United States and most regions using the 3-class e-bike framework, legal e-bikes cap at 750W and 28 mph. Anything exceeding 28 mph loses consumer e-bike status.

Road and Trail Restrictions

Because of the speeds and motor wattage, these vehicles are banned from traditional bicycle lanes, multi-use paths, and state/national park bike trails.

Licensing and Registration

Riding a Class 4 model on public roads generally requires vehicle registration, a driver's license or motorcycle endorsement, insurance, and road equipment such as turn signals and brake lights.

Otherwise, they are restricted strictly to private property or designated OHV (off-highway vehicle) trails.

Are Class 4 E-Bikes Legal to Ride on Public Streets?

No, not as standard bicycles. In the United States, there is no official legal classification called "Class 4" under federal or state bicycle laws.

Standard e-bike laws exclusively recognize Classes 1, 2, and 3, which cap motor power at 750W and motor-assisted speeds at 20 mph or 28 mph.

Any two-wheeler marketed as a "Class 4" e-bike—or any electric bike capable of speeds over 28 mph and/or motor output exceeding 750W—is legally treated as a motorized vehicle, moped, or electric motorcycle (e-moto) rather than a bicycle.

What This Means for Riding on Public Streets

Because these vehicles fall under motor vehicle codes rather than bicycle statutes, riding one legally on public roads requires meeting the same standards as a moped or motorcycle.

Road & Lane Restrictions

You cannot ride in designated bicycle lanes, on multi-use paths, or on sidewalks. You must ride in regular traffic lanes alongside motor vehicles.

Registration & License Plates

Most state DMVs require high-power e-bikes to be titled and registered. This often requires a Manufacturer Certificate of Origin (MSO/COO) and a federally compliant 17-digit VIN, which many direct-to-consumer e-bike brands do not provide.

Driver's License

Operating a vehicle exceeding Class 3 limits typically requires a valid standard driver's license, a moped permit, or a motorcycle endorsement, depending on state speed thresholds, usually 30 mph+.

DOT Safety Equipment

To be road-legal, motor vehicles must include Department of Transportation (DOT)-compliant equipment, including:

• Turn signals, headlights, brake lights, and rear reflectors
• Dual rearview mirrors
• A DOT-approved horn
• Department-certified tires and brakes

Insurance & Helmets

Riders generally must carry minimum motor vehicle liability insurance and wear a DOT-approved helmet.

If a high-powered e-bike lacks a VIN, registration, or required safety equipment, it is legally restricted to private property and designated off-road OHV/motorized trails.

Riding an unregistered, non-compliant unit on public streets risks traffic citations, impoundment, and personal liability in the event of an accident.

Do I Need a Driver's License, Registration, or Insurance to Ride a Class 4 E-Bike?

Yes, in almost all jurisdictions, you will need a driver's license, registration, and insurance.

Under federal law and the standard vehicle codes used across the United States, there is no legal designation for a "Class 4 e-bike" as a bicycle.

State and federal e-bike frameworks only recognize Classes 1, 2, and 3, which cap motor output at 750W and assisted speeds at 20–28 mph.

Once a bike exceeds these limits—for example, a motor over 750W, a throttle operating above 20 mph, or assisted speeds exceeding 28 mph—the law stops treating it as an electric bicycle.

Instead, high-powered models marketed by retailers as "Class 4" are legally classified as motor vehicles, typically mopeds, motor-driven cycles, or motorcycles.

What You Need for a "Class 4" Bike

Driver's License

You typically need a valid standard driver's license or, in many states such as California or New York, a motorcycle license or endorsement (Class M1/M2).

Vehicle Registration

The vehicle must be registered with your local DMV/BMV. This requires:

• A Manufacturer's Certificate of Origin (MCO) or title
• A 17-digit Vehicle Identification Number (VIN)
• A license plate and registration fee

Insurance

You must carry minimum motor vehicle liability insurance. Standard homeowners or renters policies exclude motorized vehicles, so this requires a motorcycle or moped policy.

Safety Equipment

To be road-legal, the vehicle must meet Department of Transportation (DOT) standards, including:

• Headlight
• Brake light
• Turn signals
• Mirrors
• Horn
• DOT-approved tires

Location Restrictions

Because they are motor vehicles, you cannot ride them in bike lanes, on multi-use paths, or on pedestrian trails. They are restricted to public roadways alongside standard traffic.

The "Off-Road Only" Catch

Many bikes sold with a "Class 4" or "Track/Unlimited" mode, such as certain Sur-Ron, Talaria, Super73, or customized high-wattage bikes, are shipped without a 17-digit VIN or DOT-compliant equipment.

If your bike lacks a VIN and an MCO, the DMV cannot register it. In that case, the bike is strictly limited to private property and closed off-road courses.

Riding it on public roads or bike lanes is illegal and risks fines, vehicle impoundment, or citations for operating an unregistered, uninsured vehicle.

A More Practical Alternative: Himiway D5 2.0 20"

For many riders, the extreme speed and power associated with so-called “Class 4” e-bikes may be more than they actually need. If your priority is everyday usability, comfort, cargo capacity, and off-pavement capability, the Himiway D5 2.0 20" offers a more practical electric bicycle for daily riding.

The D5 2.0 20" is powered by a 750W motor producing up to 90 Nm of torque, providing strong assistance for hills, heavier riders, and loaded trips without stepping into the multi-kilowatt power levels commonly associated with “Class 4” machines.

It also combines wide fat tires with front and rear suspension, making it an appealing choice for shoppers looking for an electric mountain bike full suspension setup that can handle rough roads, gravel, uneven pavement, and recreational riding with greater comfort.

Its 48V 15Ah battery provides up to approximately 70 miles of pedal-assist range under favorable conditions, while the bike supports a maximum payload of up to 440 lb. The compact 20-inch wheel platform also makes it easier to manage than many larger fat-tire bikes.

For riders searching for the best fat tire electric bike, outright speed should not be the only consideration. Range, suspension, braking, rider comfort, payload capacity, and how easily the bike fits into everyday life can matter much more. The Himiway D5 2.0 20" brings these qualities together in a versatile package designed for riders who want capability without turning their e-bike into an electric motorcycle.

What Happens If I Get Caught Riding a Class 4 E-Bike on a Standard Bike Path?

Getting caught riding a "Class 4" e-bike on a standard bike path exposes you to motor vehicle violations, path-trespass fines, and vehicle impoundment.

Under U.S. federal and state frameworks, legal e-bikes are capped at Class 1, 2, and 3 (maximum 750W motor and assisted speeds up to 20 or 28 mph).

A "Class 4" designation is an informal industry or marketing term for electric bikes exceeding 750W or capable of speeds above 28 mph, such as Sur-Ron, Talaria, or modified high-wattage commuters.

Legally, these are categorized not as bicycles, but as mopeds, motor-driven cycles, or off-highway electric motorcycles.

Potential Legal & Practical Consequences

Traffic & Municipal Infractions

Most local and state jurisdictions explicitly prohibit motor vehicles, motorcycles, and unauthorized motorized equipment on multi-use paths, greenways, and standard bike lanes.

You can be cited for operating an unauthorized motorized vehicle on a non-motorized trail or for reckless operation in a pedestrian zone. Fines typically range from $50 to $500+, depending on municipal park and road codes.

Motor Vehicle & Licensing Charges

Because the bike exceeds standard e-bike wattage or speed thresholds, an officer can treat it as an unregistered motor vehicle. This can result in citations for:

• Operating an unregistered and unplated motor vehicle
• Operating without valid vehicle insurance
• Operating without a valid driver's license or motorcycle endorsement, if required by state law for mopeds or motorcycles

Vehicle Impoundment

Police and park rangers frequently tow or impound non-compliant e-motos and out-of-class e-bikes operated on public paths, especially if the rider cannot produce proof of ownership or street-legal registration, or if the vehicle lacks required Department of Transportation (DOT) equipment such as mirrors, turn signals, and a DOT headlight.

You would be responsible for towing and daily storage fees to retrieve it.

Severe Liability in Collisions

If you are involved in an incident with a pedestrian, standard bicyclist, or pet on a path, operating an illegal motor vehicle in a pedestrian-oriented space creates near-automatic civil negligence (negligence per se).

Standard homeowners or renters insurance liability policies typically exclude coverage for motorized vehicles, leaving you personally liable for medical bills, property damages, and potential criminal reckless endangerment charges.

Where These Bikes Can Actually Be Ridden

Because a Class 4 machine is essentially an electric motorcycle or moped:

• Private property: Legal with landowner permission.
• OHV/off-highway vehicle areas: Designated motorized dirt-bike and ATV trails on public BLM or USFS lands, often requiring an OHV sticker.
• Public roadways: Only if the vehicle complies with your state's moped or motorcycle standards, including DOT lights, mirrors, horn, VIN, license plate, registration, and proper driver licensing and insurance.

What Is the Average Motor Wattage and Battery Range of a Class 4 E-Bike?

Under the standard 3-class electric bicycle system used across the U.S. and recognized internationally, legal e-bikes cap out at Class 3 (750W motor and 28 mph maximum assist speed).

"Class 4" is an informal industry term used for high-powered, non-standard electric bikes, electric dirt bikes, or e-mopeds, such as models from Sur-Ron, Talaria, Super73 in "Off-Road" mode, or custom high-wattage commuters that exceed standard legal definitions.

Typical Specifications

Average Motor Wattage

• Nominal: 1,000W to 3,000W, compared to the legal 750W maximum for Classes 1–3.
• Peak Output: Often reaches 3,000W to 6,000W+, enabling speeds between 30 mph and 55+ mph.

Battery Capacity & Range

• Battery Pack Size: Typically large-capacity systems rated at 52V to 72V, usually 1,500 Wh to 3,000+ Wh / 30Ah+.
• Real-World Range: 30 to 60 miles under aggressive, high-speed throttle riding.
• In low-power or eco assist modes, range can extend to 70 to 90+ miles, but high sustained power draws significantly reduce range compared with standard commuter e-bikes.

Because these vehicles exceed the 750W motor and 28 mph thresholds, in most jurisdictions they are treated legally as mopeds or motorcycles rather than standard bicycles, generally requiring registration, licensing, or off-road use only.

Can You Still Pedal a Class 4 E-Bike, or Is It Strictly Throttle-Driven?

Yes, you can still pedal most of them—they are not strictly throttle-driven by default.

However, how functional and practical those pedals are depends heavily on the specific bike's build and intended purpose.

1. "Class 4" Isn't an Official Federal Category

Under standard U.S. federal and state laws, legal e-bikes only span Class 1 to Class 3, capped at 750W and a maximum assisted speed of 20 mph or 28 mph.

"Class 4" is an informal industry designation used by manufacturers and riders to describe high-powered two-wheelers that exceed traditional e-bike limits:

• Motor power: Typically 1,000W to 3,000W+, well above the 750W legal bicycle threshold.
• Speed: 28 mph to 45+ mph.
• Legal status: These are generally treated as mopeds, motor-driven cycles, or electric motorcycles, meaning they are typically banned from standard bike paths and multi-use trails.

2. Pedaling Reality: Functional vs. "Ghost Pedals"

Most vehicles sold under the "Class 4" label include physical bicycle pedals and a chain drivetrain, but the experience falls into two camps.

Moped-Style Hybrids: Pedal Assist + Throttle

Models like those from Super73, Ariel Rider, or Onyx often retain standard pedal-assist sensors alongside a twist or thumb throttle.

You can pedal them like a normal bicycle, and turning the pedals triggers motor assistance.

Heavy High-Speed Platforms: "Ghost Pedals"

Once a bike reaches 30–45 mph, standard bicycle gear ratios mean your legs cannot turn fast enough to add any physical propulsion, often called "ghost pedaling."

Additionally, these bikes frequently weigh between 75 and 150 lbs, making them exhausting to pedal without electric assistance.

On many of these models, the pedals serve primarily as footrests or a legal loophole to resemble a bicycle rather than a dedicated exercise mechanism.

True E-Motos: Pegs Only

Some high-power off-road models, such as Sur-Ron or Talaria, are occasionally mislabeled as Class 4 in marketing but come equipped with fixed foot pegs rather than pedals.

These are 100% throttle-operated electric motorbikes.

Summary

If the vehicle has pedals, you can legally and mechanically pedal it, and many feature functional pedal-assist modes.

In practice, however, riders rely predominantly on the throttle due to the vehicle's weight and high speeds.

Do I Need a Full-Face Motorcycle Helmet to Ride a Class 4 E-Bike Safely?

From a safety perspective, yes: a full-face helmet is strongly recommended, and depending on your top speed, an actual motorcycle-rated helmet is often necessary.

Federal and state regulations in the U.S. only officially define Classes 1, 2, and 3, capping motor assist at 750W and 20–28 mph.

Anything marketed by manufacturers as a "Class 4" e-bike exceeds these limits—often sporting 1,000W to 3,000W+ motors capable of speeds from 30 mph to over 45 mph. Legally and mechanically, you are riding an electric moped or light motorcycle rather than a traditional bicycle.

1. Standard Bicycle Helmets Are Inadequate

Traditional bicycle helmets tested under standards like CPSC 1203 are designed and certified for low-speed impacts, usually around 12 to 14 mph.

• Even NTA 8776-certified helmets, the Dutch standard designed for Class 3 speed pedelecs up to 28 mph, are not tested for the kinetic energy generated in a crash above 30 mph.
• Standard half-shell bicycle helmets leave the entire lower face, jaw, and teeth exposed. In high-speed falls or collisions with vehicles, the chin and facial area sustain a high percentage of direct impacts.

2. Full-Face Downhill MTB vs. DOT/ECE Motorcycle Helmets

Whether you need a full motorcycle helmet or an aggressive downhill bicycle helmet depends on your actual operating speeds:

Metric / Scenario	28–32 mph (Light Throttle / Pedaling)	33–45+ mph (High-Power Class 4)
Recommended Gear	ASTM F1952 Full-Face Helmet (Downhill MTB) or light ECE 22.06 motorcycle helmet	DOT / ECE 22.06 Certified Motorcycle Helmet
Ventilation & Weight	Higher ventilation, lighter (~800–1,100 g), easier if you are still actively pedaling	Heavier (~1,300–1,600 g), less airflow, but built for highway-level kinetic impact
Face Shield / Eye Protection	Requires goggles; open mouthguard for breathing	Integrated face shield protects eyes from wind, debris, and high-speed bugs
Rotational Protection	Look for Mips or similar rotational slip-plane liners	Standard multi-density EPS foam designed for heavy vehicular impacts

3. Legal Considerations

Because "Class 4" is an industry marketing term and not a recognized street-legal bicycle category under standard traffic codes, most jurisdictions classify these vehicles as mopeds, motor-driven cycles, or off-road vehicles.

• If you ride on public roads, many states mandate a DOT-compliant helmet, not a bicycle helmet, to comply with moped or motor vehicle statutes.
• Riding a Class 4 on designated bicycle infrastructure, multi-use paths, or sidewalk networks is generally prohibited.

If your Class 4 e-bike cruises between 30 and 40+ mph in mixed traffic, a full-face motorcycle helmet rated ECE 22.06 or DOT provides the necessary impact dissipation and facial protection.

If you stay closer to the lower 30 mph threshold and pedal heavily, a full-face downhill mountain bike helmet (ASTM F1952) paired with goggles is the bare minimum for adequate protection.

Are Standard Bicycle Brakes and Tires Safe Enough for Class 4 Speeds?

No, standard bicycle brakes and tires are not safe for Class 4 speeds.

"Class 4" refers to high-powered electric bikes that exceed the standard legal limits of Class 1–3, with speeds above 28 mph, often reaching 35 to 50+ mph, paired with vehicle weights of 70–120+ lbs.

At these velocities, kinetic energy escalates rapidly, pushing traditional bicycle components far beyond their structural and thermal limits.

Why Standard Brakes Fail

Kinetic energy scales with the square of speed:

E_k = 1/2 × m × v²

Stopping an 80 lb e-bike with a rider at 40 mph requires dissipating roughly four to five times the energy required to stop a standard bicycle at 18 mph.

Severe Thermal Fade

Standard rim brakes or entry-level mechanical disc brakes quickly overheat. The resin pads glaze over, hydraulic fluid boils, causing total lever squish and loss of stopping force, and standard thin rotors (1.8 mm or 160 mm) warp rapidly.

Cable Stretch & Snapping

Mechanical cable brakes experience excessive leverage flex, resulting in dramatically elongated stopping distances and risk of cable failure under emergency braking.

Structural Strain

Bicycle forks, dropouts, and mounting tabs are not engineered to repeatedly endure the sheer rotational torque generated when scrubbing off 35+ mph on a heavy chassis.

What is actually required: 4-piston hydraulic disc brakes (downhill/e-bike rated) paired with large, heavy-duty rotors (203 mm to 223 mm diameter, 2.3 mm thickness) and metallic or sintered pads, or dedicated DOT-certified moped/motorcycle hydraulic systems.

Why Standard Bicycle Tires Fail

Heat and Delamination

Standard bicycle tire casings, often thin 60–120 TPI nylon, flex rapidly at 35+ mph. The sustained friction and speed generate internal heat that can cause casing ply separation or sudden blowouts.

Bead Failure and Rim Blow-Off

Bicycle beads, whether wire or folding Kevlar, and standard hook/hookless rims are designed for light vertical loads. Under hard cornering or aggressive braking at moped speeds, high lateral forces can unseat the bead from the rim.

Puncture Hazards

Hitting road debris or a pothole at 40 mph with a standard lightweight bicycle tube or tire almost guarantees pinch flats or rim damage, which frequently leads to uncontrollable high-speed crashes.

Lack of Contact Patch

Bicycle tires are narrow and rounded to minimize rolling resistance. At Class 4 speeds, you require a wider, flatter profile with automotive/moped compound rubber to provide sufficient traction for short-distance stops.

What is actually required: At bare minimum, tires with an ECE-R75 certification (E-50 rating) rated for sustained speeds up to 50 km/h (31 mph). For builds exceeding 32–35 mph, true DOT-rated moped or light motorcycle tires, such as 16"–19" moto rims and tires, are necessary to safely manage the speed, impact forces, and vehicle mass.

What Is the Main Difference Between a Class 3 and a Class 4 E-Bike?

The main difference between a Class 3 and a "Class 4" e-bike comes down to legal classification, top speed, and motor power.

Under standard U.S. e-bike laws, which officially define only Classes 1, 2, and 3, a Class 4 e-bike is not legally considered a standard bicycle. Instead, it crosses into the category of a moped, electric dirt bike, or motor vehicle.

Feature	Class 3 E-Bike	"Class 4" / Off-Road E-Bike
Legal Status	Recognized legal e-bike (most U.S. states)	Moped, dirt bike, or motor vehicle (not a standard bicycle)
Max Assisted Speed	28 mph (motor cuts off above 28 mph)	Exceeds 28 mph (often 30–45+ mph)
Motor Power Limit	Capped at 750W (1 hp)	Exceeds 750W (commonly 1,000W to 5,000W+)
Throttle	Pedal-assist up to 28 mph (throttle, if equipped, cuts off at 20 mph)	Full throttle capable of high speeds without pedaling
Where You Can Ride	Roads, bike lanes, and some paved commuter paths	Private property, designated OHV (off-highway vehicle) trails, or roads if registered
Licensing & Registration	Not required (age 16+ and helmet laws common)	Often requires registration, insurance, and a driver's/motorcycle license for road use

Class 3 Overview

• Legal definition: An electric bicycle equipped with a motor that provides assistance only when the rider pedals (pedal-assist), cutting off at 28 mph (motor limited to 750W).
• Rules: Most jurisdictions require an integrated speedometer, a minimum rider age of 16, and mandatory helmet use. They are typically banned from non-motorized multi-use recreational trails but permitted on public roads and street bike lanes.

"Class 4" Overview

• Industry catch-all: "Class 4" is an unofficial, industry-created label for high-powered bikes, such as Sur-Ron, Talaria, or heavily uncapped commuter builds, that exceed the 750W or 28 mph legal limits.
• Rules: Because they exceed statutory limits for low-speed electric bicycles, they are strictly prohibited from standard bike lanes, sidewalks, and multi-use bicycle trails. To be ridden on public roadways, they must meet Department of Transportation (DOT) equipment standards, including mirrors, turn signals, horn, and brake lights, and be registered with the DMV like a moped or motorcycle.

What Are the Most Popular Class 4 E-Bike Models Available on the Market?

In the official U.S. electric bicycle framework, there is technically no legal "Class 4" classification. Standard e-bikes are capped at:

• Class 1: Pedal-assist only, up to 20 mph (max 750W).
• Class 2: Throttle & pedal-assist, up to 20 mph (max 750W).
• Class 3: Pedal-assist up to 28 mph (max 750W).

However, the term "Class 4" is widely used in the enthusiast and manufacturing community to describe high-powered, "out-of-class" electric two-wheelers.

These vehicles exceed 750W continuous motor power and/or can reach speeds well beyond 28 mph using pedals, throttles, or unlocked off-road modes. Legally, they are treated as mopeds, light electric motorcycles, or off-road vehicles and are prohibited on standard bike paths and sidewalks.

1. High-Performance Hybrid / Off-Road Trackers

These models bridge the gap between mountain bikes and lightweight dirt bikes. While often sold with optional or aftermarket pedal kits to maintain "e-bike" status, they function more like electric dirt bikes.

• Sur-Ron Light Bee X: The benchmark for lightweight electric dirt bikes. It features a 60V power system, peaks at 6,000W+, and easily achieves 45–50 mph.
• Talaria Sting R (MX4) / Talaria XXX: Extremely popular alternatives to Sur-Ron, known for stronger stock gearboxes, higher peak torque, and top speeds around 45–53 mph.

2. Moped-Style & Scrambler E-Bikes with "Unlimited" Off-Road Modes

These feature working pedals and standard bicycle seating/frames but allow users to unlock off-road/track modes that push power and speed far beyond Class 3 limits.

• Ariel Rider Grizzly (52V & 72V editions): A dual-motor bike with one motor in each wheel. Stock modes comply with street limits, but in unlocked/off-road mode, speeds reach 35 to 60+ mph depending on the 52V vs. 72V configuration.
• Super73 (RX / R-Series): Super73 includes an "Off-Road Experience" mode accessible via its app that bypasses the 20/28 mph street limits to achieve 30–32+ mph using full 1,200W+ peak output.
• Ariel Rider X-Class 52V: A favorite in the budget scrambler category with a high-torque 1,000W motor, peaking at approximately 2,000W, and top speeds around 33–36 mph.

3. Heavy-Duty Cafe Racers & Speed Cruisers

These resemble vintage motorcycles or cafe racers, built with large battery packs and heavy reinforced frames.

• Onyx RCR: One of the most famous models in this category. It features pedals to satisfy aesthetic/moped loopholes but runs a 72V system with speeds topping 55–60 mph.
• Zooz Urban Ultra (e.g., Ultra Flex / Zooz 1200): Built on a heavy-duty BMX-style frame with a throttle, delivering 30–33+ mph speeds.

4. Ultra-Fast Long-Range / Stealth Bomber Clones

• Delfast Top 3.0i: Famous for long-distance battery packs and motorcycle-grade drivetrains. It reaches speeds up to 50 mph and features a 3,000W continuous motor with functional pedals.
• Enduro / "Stealth Bomber" Clones (CS20 / EEB Frame builds): Massively popular in custom DIY and direct-import communities. They typically feature 3,000W to 8,000W hub motors, 72V battery setups, and speeds between 45–60 mph.

Summary Table

Model	Style	Motor Power (Peak)	Top Speed (Unlocked)
Sur-Ron Light Bee X	Dirt / Trail Bike	~6,000W	~45–50 mph
Talaria Sting R (MX4)	Dirt / Trail Bike	~8,000W	~50–53 mph
Ariel Rider Grizzly	Dual-Motor Scrambler	~2,000W–5,000W+	~35–60+ mph
Onyx RCR	Cafe Racer / Moped	~5,000W+	~55–60 mph
Delfast Top 3.0i	Long-Range Enduro	~3,000W	~50 mph

Note: If you are purchasing or operating any of these on public streets, check your local DMV laws. Many municipalities require moped/motorcycle registration, insurance, turn signals, and a valid driver's or motorcycle license to operate them legally on roads.