Bitubo has combined generations of family race experience to create a true High-Performance World Champion Cartridge Kit for your Harley-Davidson! 100% adjustable, serviceable and tunable cartridge drop in kits with plug & play fitment into standard forks. Easily setup ride control with 20 Clicks/20mm of Compression on the left cap and 20 Clicks/20mm of Rebound on the right cap. Optimize ride comfort with fine tune preload adjustment featuring 10 turns/10mm on both top caps.