Commuter kits are chosen for reliability, range and easy fitting rather than top speed. For UK roads that means a 250W front kit with assistance to 15.5 mph; for riders with private-land access or longer, hillier routes, the 500W, 750W and 1000W rear kits add climbing power. All include battery, controller, display and the parts to fit them.
How to choose: start with your legal position (250W for public roads), then your daily distance. A 36V 13Ah battery covers 30 to 40 km of assisted riding; 48V 20Ah covers 50 to 70 km. Our battery size guide and commuter setup guide go into detail.