Zero drag patented design 9002 ISO certified sealed racing bearings are installed along with a matching set of stainless steel washers to protect and reinforce the outside bearing seal Extruded from a special plastic formula for low friction and long life Engineered to improve drive chain speed and chain tension accuracy A specific fit combination of stainless steel or O.E.M style bolts are included with each roller Race tested and custom sized for each model 1 year manufacturer's warranty
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