Zipp Service Course SL-OS (Black) (1 1/4) (90mm)

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This is the Zipp Service Course SL-OS Stem with a +/-6° rise. The Service Course SL-OS was designed for 1-1/4" steerer tubes, but with the included shims you can use the stem on 1-1/8" steerer tubes. With the 1-1/8" shims you can also adjust the angle of your stem from +/-6° to +/-8° or +/-4°. Your stem has to resist flexing during sprints and accelerations, clamp securely to the fork and handlebar, and support your weight over significant impacts. It’s a difficult job, but the Service Course SL-OS stem is still able to combine strength, stiffness and reliability at a weight of only 135 grams (100mm). The Service Course SL's 3D-forged, 7075 series aluminum body paired with titanium Torx bolts delivers exceptional strength-to-weight ratio while allowing for smooth lines to complement the aesthetics of modern frames.


  •  Torx® head bolts that give precise torque readings while reducing the chance of getting stripped
Weight: 140g (100mm)   
Sizes: 70, 80, 90, 100, 110, 120, 130mm 
Clamp Diameter: 31.8mm    
Angle: ±6° (1-1/4); ±4°; ±6; or ±8° (1-1/8) 
Steer tube diameter: 1 1/4in or 1 1/8in    
Stack height: 41mm  
Clamp width: 47mm  
Max clamp torque: 5Nm  

This product was added to our catalog on June 15, 2015