HD 516 AMORTISSEUR OHLINS HARLEY DAVIDSON SOFTAIL HERITAGE CLASSIC 2018 2023. Product example for Ohlins shock absorber Please note that this picture may differ from the actual product application. Single tube Piston diameter: 46 mm Monotube high pressure gas type of shock absorber with internal reservoir in the main body Adjustable rebound damping on single tube shocks. Adjuster wheel above the end eye Hose mounted hydraulic spring preload adjuster Length: 330 +/-6 mm Stroke: 43,5 mm Rate N/mm: 105 N/mm Mounted spring: 21102-36.