I got a pk80 on my 29" Schwin, only real issue i had was the sprocket. 9 holes, rim had 8 positions. So i lovingly tapped it into place with a rubber hammer, and was able to get all 9 screws in with zero damage to spokes. Had no issues truing it up, it actually was easier than the cruiser bike i took the engine off of. Only issue i couldnt get around was i had to mount the motor high, so the chain, which fit fine on the cruiser, was now too short, so i had to order another. No other issues as of yet.