Ohlins S36D Black Line Rear Shocks For Harley Dyna These Ohlins shocks feature precision machining on all componentry, allowing for a low friction, high performance design. The internals, unlike standard gas over oil systems, feature a specially divided internal piston which keeps the gas and oil separate. This provides exceptionally consistent performance and avoids fade from use. The wide range of preload adjustments allows you to soften or stiffen the ride, and can also accommodate many riders varying in weight. Features: Monotube high pressure gas shock absorber with internal reservoir in the main body STX single tube design Built-in adjustable preload Multiple spring rates available to accommodate a wide range of riders Hard anodized Nitrogen charged Precision CNC-machined components Low-friction piston rod Low-friction eyelets Serviceable and repairable 1.41 piston diameter Includes preload adjuster tool Sold as a pair