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Use open end for quick adjustment of spoke nipples and a semi- closed end for those hard to turn nipples that require more torque
which can be pulled during an emergency to remove the cheek pads from the helmet
minimizing wind and road noise for crystal-clear voice transmission
Fit these and have peace of mind
Replacement Rings: RSB6640
Rear Sprocket OE Steel 798 51T #428 SIZE_13 Tooth Use open end for quickMTX OE Steel sprockets are strong and durable, heat treated and hand finished for longevity. Front sprockets are constructed from SCM420 chromoly steel alloy whereas rear sprockets are constructed from C45 high carbon steel with a Zinc electroplated finish. Designed as an OEM replacement to exceed OEM specifications at a fraction of the price, making them your ideal cost effective solution for replacing old worn and warped sprockets. OEM replacement.