NTR Twin R1 Reliable performance gas mono-tube for twin-shock bikes to be enjoyed on the road... The best gas mono-tube damper you can get for your twin-shock Dyna bike, the NTR Twin R1 shocks provides superb control with a broad adjustment range to suit any rider. These shocks feature all the benefits of the other NTR shocks plus simple adjustment and easy spring preload settings. Special Design Fully serviceable and rebuildable with special designs available upon request. Titanium Finish Titanium and hard-anodised parts are hand built to last not only the lengthiest endurance races but also the harshest of winters. Offers 1" more travel than the OE or Premium Emulsion Shocks offered by Harley.