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High security disc-style cylinder is pick and drill resistant
User Manual
laid back and stylish side of bike riding
under-tread reinforcement
With nearly two decades of making the world’s winningest chainguide
E*thirteen Helix R Chainring for 107BCD Cranks Crank High security disc-style cylinder isHelix Race Chainring 107BCD 38T Shimano SRAM 11 12s Chain Compatible Black The Helix R 107BCD Chainring, designed for 4 bolt 107 BCD cranks like SRAM Red or Force including power meter equipped cranks, offers a performance upgrade for Gravel and Road cyclists. The 38, 40, and 42T rings pair perfectly with e*thirteens cassettes for more overall range and higher top speeds. Made from durable 7075 alloy, they're CNC sculpted for a high stiffness to
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