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The SD-System buttons have flat sides and are mounted into square pockets in the hub and the ring
Designed to control pitting
Recommended mix up to 50:1 (2%)
Use with a FUCHS Silkolene chain lubricant
stability and feel
Renthal Front Motorcycle Sprocket Grooved 479-520 12 Tooth Size:12 Tooth The SD-System buttons have flatRenthal Front Chainwheels are carefully crafted in our state of the art manufacturing facility in Manchester, UK using only the highest grade raw materials available. Using advanced computer engineering alongside CNC machining, Renthal consistently achieves perfect concentricity, fitment, load dispersion and uncompromising strength whilst ensuring maximum power delivery from each and every motocross front sprocket we produce. As a safety critial