RSI Tapered Handlebar Snowmobile7075 T6 Heat treated aircraft tapered aluminum. Tapered walled aluminum flexes to reduce rider fatigue and arm pump. Tapered wall construction offers the strongest snowmobile handlebar available. Clamp surface is 1 1 8" and tapers down to 7 8" to fit controls and grips. 1 1 8" oversized clamp kit or risers are required to mount to snowmobile. Custom snowmobile specific bends offer more comfort than stock handlebars. Optional aluminum hooks are