Utilizes a large 46mm bore and deflective disc piston for precise damping. The beefy 16mm hard chrome shaft rides on custom Viton® seals for low friction and leak free life. The 465 is custom tuned for each application and is completely optimized for each bike| from the damping and spring rate all the way down to the jounce bumper. With Remote Adjustable Preload Adjuster (RAP): Suspension tuning can dramatically improve the ride quality| handling and comfort of your motorcycle and the more tools available to work with| the better the results. With that in mind| Progressive® Suspension has added a hydraulic ride height adjuster to their 465 Series line of high-performance monoshocks. The 46mm bore shock is also stuffed with features like deflective disc damping| threaded body and a five-position rebound adjuster. Setting it up to perfectly match your bike| weight and riding style is now a few clicks away.