Originally Posted by happycheapskate
Why not? Mine (Dax Friction Drive) works fine.
Try running your rear tire at the lowest recommended/rated pressure, and putting more roller pressure than usual. You might get some more vibration or drag than usual, but you should make up for it in traction.
What tire and drive system are you using?
I'm using a 2.125 whitewall street tire that's pretty smooth now. I relieved some of the roller pressure because I broke a crank on a different motor. Part of that was due to a flat spot in the wheel though (which I have straightened out now.) It's a home-built job that uses a pretty smooth bicycle peg for the drive roller. I need something rubber or rubber coated to help with traction. I've wrapped the peg in duct tape and ran it in the rain without too much trouble, but the tape eventually wears out.