Zipp Service Course SL-OS 1 1/4" Stem indoortrainer it delivers sharp contrast and

it delivers sharp contrast and glare reduction in bright conditions

Featuring a reversible head for Presta and Schrader with a valve knob that unwinds to apply just the right amount of pressure

and customization

and every little journey in between

Zipp Service Course SL-OS 1 1/4" Stem indoortrainer it delivers sharp contrast andBuilt 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