Direct replacement for the stock fork tube plugs. The threaded adjuster gives 20mm of adjustment. Perfect to tune your bike for a gentle cruise or to stiffen-up the front end for a more aggressive riding style or a 2-up-on-holiday heavy load. Compatible with standard ride height fork springs or 1 -2 lowered fork spring kits. - Threaded preload adjuster with 20mm (0.8 ) of adjustment - Compatible with standard and 1 -2 lower ride heights - Improved handling and performance - Replaces stock 49mm fork plug