Zipp Service Course Sl 90Mm +/-6D 1-1/8" Beyond Black 31.8Mm EXO * The NACA rim profile

* The NACA rim profile is 64mm deep and 26mm wide with an airfoil shape that is proven through wind-tunnel testing to produce the lowest possible drag without sacrificing its stability

AirEvac 2 goggle-compatible ventilation system

non-marking BioGrip outsole provides sure footing and self-cleaning convenience

providing comfort and support during activity

Zipp Service Course Sl 90Mm +/-6D 1-1/8" Beyond Black 31.8Mm EXO * The NACA rim profile* Incredibly stiff stem body with industry leading 1. 85g NM of stiffness* Improved faceplate and body geometry adds to stiffness and simplifies installation by spreading the torque load more uniformly* 125g (100mm)* Matte Black