Guide

A 49cc dirt bike usually tops out around 20–30 mph, though limiters, gearing, rider size, and terrain can push the number lower or higher.

A well-tuned 48V electric bike typically tops out at 20–28 mph stock, and 25–35 mph when de-restricted off-road.

Most stock 196cc mini bikes run about 20–25 mph, while mods and gearing can raise or lower top speed.

A stock 110 dirt bike usually runs around 30–45 mph, with gearing, rider weight, and terrain swinging the number.

A typical 100cc dirt bike reaches 40–55 mph on flat ground; gearing, rider weight, and terrain can move that number up or down.

Most 125cc dirt bikes reach 45–75 mph, with trail 4-strokes on the low end and race 2-strokes at the top.

Road bikes can hit 65–75 km/h in sprints, 80–100+ km/h downhill, and pros often average over 40 km/h in races.

Most 70cc dirt bikes reach 25–40 mph (40–64 km/h) in stock trim on level ground.

Most stock 50cc bikes top out around 25–35 mph (40–56 km/h), with rules often capping design speed near 28 mph (45 km/h).

Most street-legal e-bikes assist up to 20–28 mph (32–45 km/h), while European pedelecs stop assistance at 25 km/h.