Phil Wood seatpost collar

Phil Wood & Co. seatpost collars are machined from solid USA-produced billet aluminum to the same extremely high quality standards applied to all Phil products. Specifications • sizes: 28.6mm, 30.0mm, 31.8mm, 34.9mm • weight 34-42g • available in eight colors Sizing info Not sure which size you need? Don't just take a wild guess - measure your seat tube or ask us! Helpful hints: Most steel frames that take a 26.8 or 27.2mm seatpost use a 30.0 collar. Most aluminum frames that take a 27.2mm seatpost use a 31.8 collar. Aluminum frames that take a 31.6mm seatpost use a 34.9 collar.