I've got some 2.75" wheels for the front of the skid, and the BM 3 Wheel Kit for the back. I'm thinking(Hoping) that this should take some friction out of the skid and help top end. The sled does not seem to want to role that well and on a stand it's hard to pull the track around. We've got an RX-1 with extra wheels and it rolls like it's on ballbearings. We use to put extra wheels on the front of the skid on V-Max4's and get an extra 2 mph on radar. What does everyone think? Personally I think with no wheels on outside of sliders there has to be a lot of friction and wheels can only help.