Your e-bike range will vary depending on many different conditions, from your battery size to weather. Some of the most common factors include battery size and age, rider’s weight, average biking speed, level of assistance used, hilly terrain, wind, tire pressure, and outside temperature.
If your tires are low, they have more friction with the ground, making it difficult for you and your motor to maintain high speed. If you live in a hilly area, your motor will work harder to help you climb hills. The harder the motor works, the more energy it requires from the battery. Things like head wind and heavy cargo loads also drain the battery faster.