Even if you have studs I would still recommend them. Warm days and cold nights create a icy nightmare for keeping your sleds cold. Has all sorts of trouble in minocqua 2 years ago during late season riding, overheating issues big time. slapped on some ice scratchers and significantly reduced the problem. I dont always run with them down, when not needed I just put them up but be careful they can rub down your rail. I have duraflex and recommend them.