Ideal for any trailer. Deep channel design suspends carbide runners, reducing friction between ski and trailer to make loading & unloading quick and easy. Multi Glides Wide are designed to accommodate all dual runner skis. Multi Glides accommodate sleds with up to 7" of ski stance variance. Multi Glides Wide accommodate sleds with 11" of ski stance variance. Eliminates damage to trailer caused by carbide wear rods. crack, chip or wear out. Grips sold seperately.