Original BMC seatpost for Speedmachine 01 Gen 1. Available in 0mm, and 25mm offset versions: - 0mm offset = adjustable to 0, 12.5, 25mm offsets - 25mm offset = adjustable to 25, 37.5, 50mm offsets The 400mm length can be easily cut to fit your exact requirements. This genuine replacement seatpost is supplied complete with saddle clamp hardware.