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Ultra-lightweight at only 21 grams
and reliable pedal engagement
Mount your computer and light in the same position
while the adjustable flip chip dropout lets you fine-tune the wheelbase and tyre clearance to suit your ride
Zipp Service Course SL-OS 1 1/4" Stem indoortrainer Ultra-lightweight at only 21 gramsBuilt 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