All new Revo-A coil design for the M-Eight Softail Available in 12.5", 13", and 13.5", standard or heavy-duty applications Revo-A coil spring provides superior ride comfort, improved performance, and increased resistance to bottoming for all day comfort Provides optimum rebound performance that can be fine-tuned for any given rider weight, personal ride preference, or personal riding style Adjustable preload for rider set up, also allows for minimal pre-load adjustment when changing between rider's weights and loads Seven external knob adjustments allow fine-tuning of rebound utilizing needle valve technology to adapt to your riding style Low friction sleeve bearings both top and bottom for ease of installation, this also allows the shock to float in its mount and avoid shock bind Hard anodized, machined billet aluminum 46 mm mono tube utilizes a lightweight high flow piston design for improved fluid flow resulting in unmatched handling and bike control Hard chromed shaft is 14% larger for increased strength High quality chrome-silicon spring for consistent spring rate for the life of the motorcycle Internal floating nitrogen piston ensures consistent damping performance Deflective disc valving self-adjusts to frequency and ensures controlled performance Legend's durable and low friction sealing system and sliding bearings provide improved performance and feel Available in Black Type III hard coat anodize Easy installation and adjustment replacing the stock shock and mounts with original OEM hardware Sold as Mono Shock (1 shock only) Preload wrench included Designed for optimum performance with the Legend Axeo front suspension Lifetime Warranty Made by hand in Sturgis, SD, USA P65 WARNING: Cancer and Reproductive Harm.. SHOCKS REVO A 13.5" STD