Progressive Suspension 412CRZ-4064C Chrome 12.5" Shock Help achieve a perfect balance of lowered Stance and ride quality Combine a flat-wire spring with a progressive main spring 12.5 in. Shock sits like 11.5 in. Units under the weight of the bike but still utilizes the full stroke when terrain demands it The end result is a lowered shock that rides like a traditional height Unit Five-position preload adjuster