Product Description The SIDLuxe Ultimate RL Solo Air rear shock from RockShox with Trunnion shock mount is designed for cross-country use and is light and powerful. Specifications:Application:Cross CountrySuspension Type:airSize x Stroke (mm):145 mm x 27.5 mm, 145 mm x 30 mm, 145 mm x 32.5 mm, 145 mm x 35 mm, 165 mm x 37.5 mm, 165 mm x 40 mm, 165 mm x 42.5 mm, 165 mm x 45 mm, 185 mm x 47.5 mm, 185 mm x 50 mmRear Shock Mounts:TrunnionTechnical Information:Damping System:RLBushing Material:steelBody Material:AluminiumShaft Material:AluminiumAir Chamber Volume:Solo AirAdjustment Options:Compression:Tune MidRebound:Tune MidRemote:noFeatures:2-position pressure setting (Open/Lock)420 lb lockout forceexternal rebound adjustmentMaxima Plush damping oil for less friction and improved responseinstalled volume spacerTechnology:Damping Markings: If you don't adjust your damping properly, you might as well be riding someone else's bike. But why waste plastic clips or rulers to adjust the suspension again and again? For easy and accurate setup of the perfect suspension, the shock markings are printed directly on the suspension fork stanchions and the rear shock housing. Manufacturer Numbers:145 mm x 27.5 mm:00.4118.305.019145 mm x 30 mm:00.4118.305.018145 mm x 32.5 mm:00.4118.305.017145 mm x 35 mm:00.4118.305.016165 mm x 37.5 mm:00.4118.305.015165 mm x 40 mm:00.4118.305.014165 mm x 42.5 mm:00.4118.305.013165 mm x 45 mm:00.4118.305.012185 mm x 47.5 mm:00.4118.305.011185 mm x 50 mm:00.4118.305.010Contents:1 x Manufacturer: SRAM LLC 1000 W. Fulton Market 4th Floor Chicago IL 60607 USA info@sram.com Distributor: SRAM Europe Sales and Services B.V. Paasbosweg 16 3862 ZS Nijkerk Netherlands info@sram.com