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and excellent power transfer for training rides
Ride farther
Featuring a reversible head for Presta and Schrader with a valve knob that unwinds to apply just the right amount of pressure
and reliable pedal engagement
it delivers sharp contrast and glare reduction in bright conditions
Zipp Service Course SL-OS 1 1/4" Stem indoortrainer and excellent power transfer forBuilt for riders chasing a lightweight, race ready cockpit without sacrificing fit flexibility, the Zipp Service Course SL Alloy Road Stem delivers pro level stiffness, clean aesthetics and versatile compatibility in one premium package. Constructed from high strength 7075 aluminium with titanium hardware, the Service Course SL OS is designed for oversized 1 1 4" steerer tubes commonly found on Giant and Canyon bikes, while the included shims also
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