I went on a 42 mile ride (averaging 18-20mph) (high torque MSP 1800wh) with Marty (Tesla 1480) and he was getting better mileage than me; we both weigh more or less the same and I only had 15% battery left on my MSP and he had close to 30% on his Tesla. I think the lower unicycle weight, less power and thinner tire really make a difference in range. If you are doing 20-25mph constant & weighing 180lbs you should expect approx 35-40mile range.