I have an F7 Sno-Pro with a 1" track (I swapped it), and 153 1.175" Woody's Megabites. It was terrible with the stock carbides. But I just put on 9" Carbide Shaper bars. The thing now turns on a dime, steering effort is low. It's actually scary how well it turns. The sled can suddenly oversteer on packed roads, so I'll probably have to introduce some understeer by towing out the ski's. This is the most responsive front end I have tried, and the easiest to steer. The Shaper Bars are definitely worth the money!