Zipp Service Course SL Seatpost's better fit means better performance. If your saddle is out of position, you’ll waste energy with every pedal stroke. That was our foremost consideration in creating the Zipp Service Course SL seatpost.  The secure, low-profile clamp allows the saddle to slide farther back along the rails, and with 0 mm and 20 mm setback options, it’s possible for nearly any rider to achieve the perfect fit.  This unique clamp design also features downward-facing bolt heads that allow micro-adjustment of the saddle even after it  is mounted.
 
ZIPP SERVICE COURSE SEATPOST FEATURES:
6061 Aluminum
Bead blast black and laser-etched graphics
Diameter: 27.2 or 31.6mm
Length: 330mm
Offset: 0mm and 20mm
Minimum insertion length: 90mm
Saddle rails torque max: 7nm
Weight: 245 grams