Seller notes

Renthal - Renthal 1230-520-49GPBK 49T Black Rear Category: Twinring Sprockets Category Description: Unique flat face design keeps weight to a minimum and means the TwinRing's as narrow as a regular chainwheel. Flat socket head screws add additional strength to the chainwheel during side impacts. Self-cleaning mud grooves between every tooth on both sides help prevent dirt build up. Inner Ring is high-strength, ultra-light 7075 T6 Aluminum Outer Ring is Electroless Nickel Coated steel, expanded a...

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