How does rider weight affect eBike range?

Every additional 20 lbs of rider weight reduces range by roughly 5-10%. A 200 lb rider will get noticeably less range than the 155 lb test rider used in most range calculations. Hills amplify this effect significantly — heavier riders on steep terrain can see range drop 30-40% vs flat riding. If you're above average weight, always select a bike with a larger battery than you think you need.