What Do 100mm Rear Suspension Travel and 90mm Front Fork Travel Mean on an eBike?

When you see specifications such as “Rear Wheel 100mm Travel” and “Himiway Hydraulic Suspension Fork, 90mm Travel with Lockout,” the numbers refer to the suspension travel of the eBike.

Suspension travel describes how far the suspension system allows the wheel to move vertically when absorbing bumps and impacts. It does not simply refer to the physical length of the suspension fork or rear shock.

On a full-suspension eBike like the Himiway D5 2.0 20", suspension at both the front and rear helps isolate the rider from rough terrain, improving comfort, stability, and control.

17. Suspension Fork, 18. Rear Shock

What Does 100mm of Rear Wheel Travel Mean?

Rear Wheel 100mm Travel means the rear suspension system allows the rear wheel to move through approximately 100mm, or 10 centimeters, of suspension travel relative to the frame.

When the rear wheel encounters a pothole, rock, tree root, gravel section, or other uneven surface, the suspension compresses and allows the wheel to move upward rather than transferring the entire impact directly into the frame and rider.

This is particularly important because impacts at the rear wheel can otherwise travel directly through the bike into the saddle and the rider's lower body.

A 100mm rear-wheel travel system can help provide:

• Better absorption of bumps and impacts
• Less shock transferred through the saddle
• Greater comfort on rough roads and gravel
• Improved rear-wheel contact with uneven terrain
• Better stability and control on light off-road surfaces
• Reduced rider fatigue during longer rides

For riders who regularly encounter broken pavement, gravel roads, campground trails, dirt paths, or other uneven surfaces, rear suspension can make a noticeable difference in overall ride comfort.

Does 100mm Rear Wheel Travel Mean the Rear Shock Compresses 100mm?

No. This is an important distinction.

100mm of rear wheel travel does not necessarily mean that the rear shock itself compresses by 100mm.

On a full-suspension bicycle, the rear wheel, frame linkage, and rear shock work together as a suspension system. Because of the frame's suspension geometry and leverage ratio, a relatively small amount of shock compression can produce a much larger amount of movement at the rear wheel.

Therefore, when a manufacturer specifies “Rear Wheel 100mm Travel,” it generally describes the total movement available at the rear wheel, not the stroke length of the rear shock itself.

What Does a 90mm Suspension Fork Mean?

The Himiway Hydraulic Suspension Fork with 90mm Travel means the front suspension fork provides approximately 90mm, or 9 centimeters, of suspension travel.

When the front wheel hits a pothole, rock, bump, or other obstacle, the fork compresses. This allows the front wheel to move upward while the suspension absorbs part of the impact.

The process can be understood simply as:

Front wheel hits a bump → suspension fork compresses → impact is absorbed → less vibration reaches the handlebars and rider.

Without front suspension, more of the impact from the road can travel directly through the front wheel, fork, handlebars, hands, wrists, arms, and upper body.

A 90mm suspension fork can therefore improve comfort and control when riding on:

• Rough city streets
• Broken pavement
• Gravel roads
• Dirt paths
• Campground roads
• Uneven recreational trails
• Roads with frequent bumps and potholes

For an eBike designed for everyday transportation and recreational riding, this amount of suspension travel provides a useful balance between comfort and maneuverability.

What Does “Lockout” Mean on a Suspension Fork?

Lockout is a feature that allows the rider to temporarily disable or significantly reduce the movement of the suspension fork.

Suspension is extremely useful on rough terrain, but it is not always necessary on smooth pavement. When riding on a flat, well-paved road, suspension movement can sometimes cause the front of the bike to move slightly up and down during hard pedaling, acceleration, or changes in rider weight.

Activating the fork's lockout makes the front suspension much firmer and reduces this unnecessary movement.

In simple terms:

Smooth pavement → Lock the fork → Firmer front end and less suspension movement

Rough road or trail → Unlock the fork → Suspension absorbs bumps and improves comfort

This gives riders more flexibility because they can adjust the front suspension according to the terrain.

How Do 90mm Front and 100mm Rear Travel Work Together?

A ebike with suspension at both the front and rear is generally described as a full-suspension eBike.

On the Himiway D5 2.0 20", the 90mm front suspension fork helps absorb impacts reaching the front wheel, while the 100mm rear-wheel suspension travel helps manage impacts reaching the back of the bike.

The two systems work together to reduce the amount of vibration and impact transferred to the rider.

The front suspension primarily helps isolate the handlebars, hands, wrists, arms, and upper body, while the rear suspension can significantly reduce the impacts that would otherwise travel through the frame and saddle.

This can be especially beneficial when riding over repeated bumps because both wheels are able to respond to changes in the terrain instead of relying only on the tires and frame to absorb impacts.

Why Full Suspension Can Improve eBike Comfort

Electric bikes are generally heavier than conventional bicycles because they carry components such as a motor and battery. They can also maintain relatively high speeds with less rider effort.

As a result, hitting a pothole or rough section of road can produce a noticeable impact.

A full-suspension system helps manage these forces by allowing both wheels to move more independently over uneven terrain.

For riders who prioritize comfort, this can make a substantial difference on longer rides. Instead of every bump being transmitted directly through the bike, the suspension absorbs part of the impact before it reaches the rider.

This can make the bike feel smoother and more composed on rough pavement, gravel, dirt roads, and other uneven surfaces.

For riders searching for the best full suspension ebike, comfort should be considered alongside suspension travel, handling, and overall stability. A well-designed full-suspension model can reduce repeated impacts from rough surfaces while helping both wheels maintain better contact with the ground. This is especially valuable for longer rides or routes that combine pavement, gravel, potholes, and dirt roads. Rather than choosing full suspension only for aggressive trail riding, everyday riders can also benefit from the smoother, more controlled ride it provides.

What Do the D5 2.0 20" Suspension Specifications Mean in Simple Terms?

The suspension specifications of the Himiway D5 2.0 20" can be summarized simply:

• 90mm front fork travel: The front suspension can absorb bumps by allowing approximately 90mm of suspension movement.
• 100mm rear wheel travel: The rear suspension allows approximately 100mm of movement at the rear wheel to absorb impacts.
• Front fork lockout: The rider can make the front fork firmer when suspension is not needed, such as when riding on smooth pavement.
• Full suspension: Both the front and rear of the bike are equipped with suspension systems.

Together, these features are designed to make the D5 2.0 20" more comfortable and stable across a variety of everyday riding conditions.

For riders traveling over neighborhood streets, gravel paths, campground roads, broken pavement, or light trails, the combination of 90mm front travel and 100mm rear-wheel travel can help smooth out the ride while maintaining better wheel contact and rider control.