For tracks, hands down the 1.5 Rip2 is the way to go. I've had the 1,25 rip2, back country 1.75 and Hurricane 1.75. The stock rip 2, even studded up, still doesnt have as much traction as a 1.5 or bigger. The back country 1.75 is an animal, but does scrub some top end and is ONLY offered in 2...