Rockshox Deluxe Ultimate RCT Rear Shock Light on grams, heavy on capability. The Rock Shox Deluxe Ultimate RCT Rear Shock is the total package: an inline shock that's ready for aggressive descents, with the weight savings needed to climb back to the top. The Deluxe Ultimate features the Debon Air+ XL air spring, for a coil-like feel with an exceptional tuning range, all in a compact, inline unit. The RCT damper allows riders to fine-tune with a new lighter compression tune, and independent low-speed compression and rebound adjusters, as well as an easy-access Open/Firm lever. The Rock Shox Deluxe Ultimate RCT Rear Shock is light on grams, heavy on capability. Features Lightweight and streamlined design with heavy-hitting capability New lighter compression tunes lets riders dial in the perfect balance of capability and pedaling efficiency RCT Damper with independent low-speed compression and rebound adjustments, and an easy-access Open/Firm lever Debon Air+ Linear XL air spring offers a coil-like feel with exceptional tuning range in a compact, inline unit New bottom-out system with a more open compression and air spring feel, with less unwanted noise SPECIFICATIONSSpring Debon Air+ Linear XL Air Spring Damper RCTRebound Tune R55Compression Tune C30Lockout Force X4Weight N/A | Sram | Rockshox Deluxe Ultimate Rct Rear Shock 165X45