Saddle Rail Clamp outer-pieces to adapt WCS Alloy 1-bolt posts to various saddle rail dimensions. Features To retrofit WCS 1-Bolt alloy seatposts. Material: 7050 alloy. Sizes: 7x7mm / 8x8.5mm .
Best Price: £14.99 from Merlin Cycles
Ritchey WCS Alloy 1-Bolt Rail Clamps – Black / 7 x 9.6 Rails Reviews