Legend Revo-A Adjustable Mono Shock Softail M8 2018-2023

12.5" = Factory length replacement 13" - Comfort, performance, and resistance to bottoming 13.5" Increases shock travel Features REVO-A Coil provides improved plush ride quality , control, and resistance to bottoming out Provides optimum rebound performance that can be fine tuned for any given rider weight, personal ride-quality 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 PTFE linear 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 smooth bore mono tube utilizing a light weight high flow piston design for improved fluid flow resulting in unmatched handling and bike control Hard chromed shaft is 14%