The first major breakthrough in wear bar technology since the 1950s unique corner-carving hourglass design yeilds better control at speed with no increased steerin effort better tracking on trails - hourglass wear bar shape catches snow from ski sides to make steering more positivv average of 1in. -2in. foot tighter turning radius in soft snow conditions 20 percent lighter than conventional 1/2in. diameter round wear bars zinc-plated for corrosion reisistance lifetime wear rate is nearly equal to current round and square wear bar types manufactured by stud boy designed and tested by usi sold in pairs