Zipp Service Course SL Stem - 70mm 31.8 Clamp +/-17 1 1/8" Aluminum Matte Black B2. The Zipp Service Course SL Stem crafted from 7075 aluminum features a shape thats strong and lightweight resulting in a 1.85 grams per newton meter of stiffness. That resul
Zipp Service Course SL Stem – 70mm 31.8 Clamp +/-17 1 1/8″ Aluminum Matte Black B2. The Zipp Service Course SL Stem crafted from 7075 aluminum features a shape thats strong and lightweight resulting in a 1.85 grams per newton meter of stiffness. That results in no-flex sprints and accelerations.
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