Zipp Service Course SL Stem - 90mm 31.8 Clamp +/-17 1 1/8" Aluminum Matte BLK B2 Model=Grip Drive HP Pump USB-C waterproof charging (cable not

USB-C waterproof charging (cable not included)

so refining position can produce some of the biggest aero gains of all

Perfect shifting through better design even through the toughest gravel terrain

+3mm offset = 49mm chainline

Simple pivoting quick release on one arm makes it easy to open the brake to remove a wheel

Zipp Service Course SL Stem - 90mm 31.8 Clamp +/-17 1 1/8" Aluminum Matte BLK B2 Model=Grip Drive HP Pump USB-C waterproof charging (cable notZipp Service Course SL Stem 90mm 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. Forged AL 7075 Machined and relieved faceplate Features titanium hardware with TORX heads on all bolts for precision torque readings and ease of adjustment