This direct-mount fender uses a proprietary and sturdy 4-point attachment to secure to the fork and comes in two lengths for tailored protection. NOTE: The FOX 36 and 38 Mud Guards (both Standard and XL) have the same mounting points and are interchangeable between models. FITMENT: Fitment of this product relates to the model year of your fork. This product does not fit Rhythm Series forks, or any fork before model year 2021.