Zipp Speed Weaponry Service Course SL Seatpost, 20mm Setback, 25.4mm Diameter, 400mm Length, Matte Black, C2Matching Zipp Service Course SL bars and stems in both form and function. Dual bolt, low profile micro adjust cradle Machined internal shaft to reduce weight Titanium hardware 3D forged from a single piece of AL 7050 Minimum insertion length is 90mm Note: torque for the seat rails is 7Nm Product Specifics Defined Color: Black Offset (mm): 20 Diameter: 25. 4 Color: Black Material: Carbon Clamp Style: Standard Rails Length: 400 Today's Stock Status