All new patented design.
Increased the size and protection of the rear guide for even greater long term durability than solid body design.
All components are 100% replaceable.
Used by the 08-09 SHOCK DOCTOR / MUSCLE MILK race team in USA and Europe.
Molded from T.M. Designworks advanced oil impregnated polymer material for low surface drag and less chain plate wear.
Accepts up to 3 teeth oversized rear sprockets.