Ritchey 1-BOLT Seatpost Clamp Kit Ritchey components have been designed, built, and tested through and through for over 40 years. The testing and validation process for their new products is extensive and well researched and pass through a global testing and approval process that seems unmatched in this day in age. They create components that are elegant and practical, becoming sought after by enthusiasts and the pro peloton. Ritchey seatpost clamp kits allow safe and secure clamping of oval shaped saddle rails from(7x9. 6mm) to (8x8. 5mm) in diameter. Made for installing large railed saddles on Ritchey one-bolt posts | Ritchey | 1-Bolt Seatpost Clamp Kit 7X9. 6Mm Rails | Black | For Carbon Post