XTRIG Shock Pre-Load Adjuster 500010200201Makes changing the rear shock absorber spring preload settings very quick and easy and replaces both preload rings on your shock In their place is a mechanical device that uses the shock bodys threads to move an adjuster up and down The preload adjuster makes race sag adjustments quickly and easily Mechanical transmission Use the complete thread of the shock absorber Easy handling Adjust the preload very quickly Low weight Not affected by dirt Patent