I am a NEWBIE to this forum & love to read the information about different engines on bikes. I have an Orline front friction drive on a 12 spd Schwinn bike. It runs & moves me [ 170 lbs ] & the bike pretty well. It is the same motor as Ohllson & Rice/Chicken Power . I live in Florida & the terrain here is mostly flat, making a friction wheel drive more ideal & much simpler, in my opinion.