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If it has any problems when you receive the product, please offer any proofs (video/picture) to us, we will diagnose with your material and give you a solution.

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More details please visit this link below.

https://richbitebike.com/after-sell-service/

Smart electric bike: 1000 W 48 V high-performance motor on the rear wheel. Under normal road conditions, the maximum speed can reach 40 km / h. Smart LCD can display speed, battery status, mode and driving distance and, if necessary, set limit speed and delete distance data.
3 working modes: electric bike, auxiliary bike and ordinary bike. With the three-speed LED smart meter button, you can select the electrical auxiliary power according to your requirements. You can use the throttle to increase the speed, which is great for turning on the traffic lights. The combination of 3 modes is the better choice.
Braking system: The electric bike is equipped with front and rear disc brakes and a professional 7-speed Shimano gear system. The full suspension can absorb shocks while driving. As soon as the brakes are applied, the power supply is automatically cut off.
Delivery and warranty service: Cysum 26 inch mountain bike bikes are available in the EU, so no additional free customization is required. For all electric bicycles sold by cysum, the frame guarantee is 3 years, the engine guarantee is 365 days and the battery guarantee is 180 days, so you can order safely.