The SP-1 seatpost is made using lightweight, 2014, aluminum alloy tubing and a cold forged, aluminum, alloy head. The two-bolt head design ensures solid seat positioning and plenty of adjustability. Each post has 20 millimeters of setback and 26 degrees of seat angle adjustment. Available in anodized red, blue, gold and black with laser etched graphics. Clamp: 26.8, 30.9 or 31.6mm Length: 400mm Meets or exceeds ENM standards 26.8mm: 267 grams / 9.4 ounces 30.9mm: 291 grams / 10.2 ounces 31.6mm: 298 grams / 10.5 ounces