Zipp, Service Course SL-OS, Stem, Diameter: 31.8mm, Length: 110mm, Steerer: 1-1/4'', å±4/6/8å¡, Black

* å±6å¡ stem that fits 1-1/4 inch steerer tubes* Lightweight and stiff with a 1.73g/nm stiffness to weight ratio for better control and responsiveness.* For bikes with 1-1/8 inch steerer tubes, included shims allow stem to be adjusted for å±4å¡ å±6å¡ or å±8å¡ angles.