- Specifically developed for compatibility with Gravel, Adventure, Cyclocross and Road bikes with tires exceeding 28mm. Speedrocker XL fits up to 40-52mm while the standard model fits 28-42mm - Offers incredible stability over the roughest tracks while also providing optimum protection in all weather - Features a dual-height front spoiler, which deflects water and mud onto the wheel and downwards, away from the rider’s face - Rear mud guard utilizes an innovative telescopic extension for greater coverage near the seat tube - Held firmly in place with a rubber fastening system to suit a multitude of frame designs, including integrated recesses for brake or gear cables as required