STM Rage Primary Clutches

Rage 4 STD  Available for all OEM tapered crankshafts. Available in several diameters.   Also available in a screw-on or quick change spider.  Rigid reinforced design for higher horsepower applications. The Rage primary is...

The Rage 3 WSP-TRA primary clutch is the next generation in high performance CVT clutching.   A total redesign to be the go-to trail sled clutch. This clutch features a "Wide Spread Pin" or WSP style spider. It moves the weight circle to a larger...

Rage 4 HD tied tower     For High horsepower race applications only recommended 500+ HP HD clutch features a "spread pin" design to increase belt grip.  Available for all OEM tapered crankshafts. Available in several diameters. 8...

Weights and spring sold separately.  Uses a PS style spring.  Click here to order parts from a clickable parts breakdown -#1001611!

The Rage 4 WSP-TRA clutch is the next gen of high performance CVT clutching.   It has been totally redesigned with big power, high revving 3 cyl motor in mind.  This clutch features a "Wide Spread Pin" or WSP style spider. It moves the...

Rage 8 STD   Dual stage design 4 1st stage arms and 4 main cam arms   Available for all OEM tapered crankshafts. Available in several diameters. 8"-8.5" Also available in a screw-on or quick change spider.  Rigid reinforced...

The Rage 4 WSP-TRA clutch is the next gen of high performance CVT clutching.   It has been totally redesigned with big power in mind.  Click here to order parts from a clickable parts breakdown -#4001176! This clutch features a "Wide Spread...