Rockstop® is a durable, highly shock-absorbing rubberized polymer designed to protect your MTB rim from dings and your tire from most impact punctures and burping. The cross bridge design ensures that the Rockstop® edges press against the tire sidewall, acting as a cushion between the rock and the tire and rim, preventing pinch punctures and rim damage. The Rockstop® Wide Rim Protector is specifically designed for 35-45mm rims and has been tested on a 40mm rim. It offers superior protection and peace of mind while riding. Features and Benefits:- High shock-absorbing rubberized polymer material- Weighs approximately 250g per wheel- Easy to fit, no need for glue or extra valves- Comes ready assembled for convenience- Manufactured in the UK to ensure qualityBox Contents:- 1 x Rockstop Wide Rim Protector- Assembly guide- Rockstop® merch- Some Cumbrian air!Upgrade your mountain bike's rim protection with the Rockstop® Wide Rim Protector. Ride with confidence knowing that your rims and tires are shielded from potential damage.