Most brands list their bike's power, but avoid putting too much emphasis on the number— there is no standard for measuring this, so the performance can vary wildly. Every motor on our list is rated to a continuous, or nominal, power output of 250 watts. But even this number isn't always accurate. Instead, look for torque, which measures how much rotational force is being applied to move the motor. It's the oomph, grunt, or kick you feel when you step on the pedals. More torque means faster acceleration and increased assistance.
With most ebikes the choice of motor defines aspects of the frame geometry and to a lesser degree the suspension characteristics of the bike. Not with new Rock Mountain Altitude Powerplay. With its bespoke motor Rocky has been able to design an ebike that reflects the ride quality of a highly evolved 150mm trail bike. With instant power pickup, extended battery life and streamline proportions it’s not just the handling of the Rocky that will get you charged up for riding. It’s the best bike in this test by some margin, but we had an issue with the motor momentarily cutting and raising questions over it’s reliability.