legendsuspensionsschocks revo a 13 softail 18 24 1310 2249Revo A Coil Designed specifically for M 8 Softail Models, Available in 12. 5 ", 13", and 13. 5 ", Standard or Heavy Duty Applications, Adjustable Preload for Rider Set Up, Also Alows for Minimal Pre Lead Adjustment and LOADS, LEAGNAGS AND LOADS and Superior Ride Comfort, Improved Performance, and Increased Resistance to Bottoming for All Day Comfort, Features Adjustable Rebound Damping That is Specifically Designed to make Fast, and repeatable Changes