Some confusion, however, has been introduced lately about torque figures for eBikes. An IC engine’s output is listed as crankshaft torque, because the various gears and sprockets in the drive system multiply crankshaft torque; we’d need six torque figures for a bike with a six-speed gearbox. A typical liter-bike has an approximately 1.5:1 primary, a 2.6:1 first gear and a 2.5:1 final drive. Multiply 1.5 x 2.6 x 2.5 to get the overall first-gear ratio of 9.75:1. If our liter-bike has 80 lb.-ft. of torque at the crank, the torque turning the rear wheel in first gear is 780 lb.-ft., and there are different (lower) torque figures for each of the other five gears.