This is a great bike to put a 88cc Happy Time motor on. These treks have a really nice feel to them. It looks like it has some Hybrid tires. I had mountain bike tires on mine. But read that knobby (mt bike tires) create vibrations at higher speeds, so maybe it might be a smoother ride. Good luck and dont for get to replace all chinese bolts with american high grade hardware and lock tite everything.