Rock Shox Deluxe C1 Ultimate Rear Shock It's Deluxe Tailored to the latest lightweight and uber-capable trail bikes, the Deluxe Ultimate RCT offers a fully-checked damper design featuring Low Speed Compression adjustment and optimal traction control tuning. Featuring the new Debon Air+ air spring with new air can options, a wider range of Rebound adjustment, more tuning capabilities than ever before, and increased bushing overlap for improved small bump performance and grip. The result is truly Deluxe. Features Debon Air+ air spring with two new air can options allows you to tune the negative and positive air volume to find the perfect match for every bike Castled bottom-out bumper reduces harsh bottom-out, allowing you to tune the air spring to maximize grip, comfort, and control Wider range of rebound adjustment to accommodate more riders Increased bushing overlap improves small bump performance and grip Fully-checked damper design allowing for a Low Speed Compression adjustment and optimal traction control tuning | Rockshox | Deluxe C1 Ultimate Rear Shock 205X62. 5Mm Trunnion/std