Great thread-in solution to improve front suspension performance. Add preload to stiffen up the front fork for aggressive riding in the canyons. Decrease preload to soften the suspension for a day of comfortable cruising. The ability to change preload settings also provides improved front suspension performance when going from a single rider to a rider with passenger configuration. Allows the user to custom tune the front suspension for any riding condition. Pair with a Progressive Suspension Fork Spring Kit to maximize riding performance. Threaded preload adjuster with 20 mm (0.8”) of adjustment. Compatible with standard and 1”-2” lower ride heights. Improved handling and performance. Replaces stock 49 mm fork cap. Preload 1/2” hex adjustment tool included. Fork Preload Adjuster installation socket included.