There are customer questions and answers(The answers maybe from Engwe or another customer). We hope you'll get inspired by the answers. Question: where can I find parts if I want to replace?Answer: You can buy accessories on the ENGWE-BIKES official website, or contact ENGWE through the service emailQuestion: What brand batteries are in this bike?Answer:ENGWE EP-2 The battery brand is JKBAQuestion: how sensitive the throttle is when using both the pedals and motor. Some bikes accelerate at full speed as soon as you use the motor and peddle?Answer: The EP-2 electric car can reach up to 30km per hour when using pedals and motors.Question: what size are the tires?Answer: wheels 20 inches