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 a secure, low-profile clamp for the Service Course seatpost that allows the saddle to slide farther back along the rails. This unique design also offers 20mm of setback and micro-adjustment with downward-facing bolts that are accessible even if the saddle shell covers the top of the seatpost. For high strength, low weight, and efficient use of every gram, the shaft and head are 3D-forged from a single piece of 7075 aluminum - not bonded together.

Service Course SL Seatpost (20mm offset) 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 a secure, low-profile clamp for the Service Course SL seatpost that allows the saddle to slide farther back along the rails. This unique design also offers 20mm of setback and micro-adjustment with downward-facing bolts that are accessible even if the saddle shell covers the top of the seatpost. For high strength, low weight, and efficient use of every gram, the shaft and head are 3D-forged from a single piece of 7075 aluminum - not bonded together. To further reduce weight, the Service Course SL seatpost uses titanium bolts and more intricate machining than the regular Service Course post.

Zipp Speed SL Carbon Seatpost (20mm offset) Choosing components with a high range of adjustability shouldn't have to weigh you down. The Zipp SL Speed Seatpost extends our fit-first philosophy into the realm of carbon fiber. Based on the design of the Service Course seatposts, the SL Speed has the same features as its alloy siblings, with the lightweight and stiffness advantages of carbon fiber. With an extended range of adjustment, you can put your saddle right where you want it, so that it puts you in a position to get the most power out of every pedal stroke. And as with all of our seatposts, it features low-profile clamping hardware that allows you to fine-tune the saddle angle even after it's mounted. - Weight: 185g - Diameter: 27.2/31.6 - Length: 330mm - Setback: 20mm - Weight limit: 300lbs - Torque for saddle rails: 7.0Nm