suitable for e.g MTD factory's new snowmobile models, brands mmMTD, CubCadet, Yardman, Yard Machines). friction wheel (drive) rubber, this newer one with a larger diameter starts to appear depending on the machine model ~vm 2006 ->. e.g. MTD in models; 31AY77KZ603, 31AY75LU603, 31AY55T5696, 31AY55T5678, 31AY54T3678, 31AY53LR643, 31AW53LR603 (vm ->10/2016), 31AV6LHG678 (new models only), 31AS6LEG752 (new models only) outer diameter 140 mm, inner diameter 116 mm, width 13 mm