Take a look at the pic below. This is my old Helix. because of the clearance, you have to stick with the stock tires up front however in the rear, you can bump them up quite a bit. The rims you see in the back here are Douglass 10" rims (vs the stock 8") and the tires are 20's. Just look for rear rims/tires for a Honda 400 EX or 450R and the bolt pattern is the same. Not to mention I think I picked up 2 or 3 mph. The real benefit was that when it snowed, the stock tires won't do much for you, these however were excellent.
