We installed this on our 1970 Schwann tandem bike that weighs 65 pounds. It’s a snap to install. The install truly did only take about 15 minutes mostly because we used our old tire. I was concerned at first because of the combined weight of us and the bike May of been too much for the motor. The weight was no problem for this kit we go right up the hills we pedal up but with very little effort we go right up. This is a quality well made kit and gives you the feeling it will last a long time. The Leed company is Great to do business with and bent over backwards to serve us! Thanks so much!