Zipp Service Course SL SeatpostSuitable for both road cycling and gravel adventure riding, this versatile seatpost offers special shock-absorbing properties and increased comfort. Zipp has also put this model through a strict mountain bike (MTB) strength test, so you can enjoy offroad durability and support on your road or gravel bike. Benefitting from a unidirectional (UD) carbon construction, it delivers the best balance of stiffness, strength and low weight performance as you conquer every mile of road. Another highlight is its AL7075 aluminium head and robust steel hardware, which ensures a tight and secure hold to your saddle rails whatever the terrain conditions.Adjustable Carbon SeatpostThe carbon Service Course SL seatpost is specifically tuned to be more shock-absorbing than the “comfort” seatposts on the market, while still passing Zipp's strict internal MTB strength test. Flex engineered into the lightweight carbon tube keeps the rider comfortable over any terrain. Better fit means better performance, and if your saddle is out of position, you'll waste energy with every pedal stroke. The secure, two-bolt clamp makes for easy micro-adjustments of saddle position, and the head has been redesigned for maximum bolt head accessibility. With 0mm and 20mm setback options to choose from, it's possible for nearly any rider to achieve the perfect fit, and the clamp works with all saddle rail types.Features: Seatpost Material: Unidirectional (UD) Carbon Head Material: AL7075 Aluminium Hardware Material: Steel Finish: Matte with stealth graphics Use: Road, Gravel Length: 400mmTechnologies: Distinctive Zipp cosmetics. Unidirectional Carbon fibre tuned for ride comfort. Lightweight clamping system. Lifetime manufacturer's warranty.Manufacturer's Part Numbers: ZSP8056000 Matte Black 31.6mm x 400mm 20mm Setback ZSP8056001 Matte Black 25.4mm x 400mm 20mm Setback ZSP8056002 Matte Black 27.2mm x 400mm 20mm Setback ZSP8057000 Matte Black 31.6mm x 400mm 0mm Setback ZSP8057001 Matte Black 25.4mm x 400mm 0mm Setback ZSP8057002 Matte Black 27.2mm x 400mm 0mm SetbackBuy Zipp Components from Chain Reaction Cycles, the World's Largest Online Bike Store.