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Boost 15x110 front axle for responsive handling
Lightweight in-molded construction with extended rear coverage
Lightweight composite body with steel tool bits
it’s ready for the singletrack or the daily grind
even in wet or muddy conditions
Shimano ST-R8170 Ultegra Di2 Lever with BR-R8170 Disc Brake Caliper electronics Boost 15x110 front axle forThe Shimano ST R8170 Di2 Lever with BR R8170 Disc Brake Caliper delivers refined control and performance for modern road riding. Featuring wireless Di2 electronic shifting, the ST R8170 lever offers crisp, precise gear changes with an ergonomic shape designed for comfort and responsiveness. Paired with the BR R8170 hydraulic disc brake caliper, it provides powerful, consistent braking in all conditions. Whether you're assembling a front or rear setup,
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