Use only SRAM parts with SRAM components. Installation of parts and accessories not originally intended could result in less than optimal performance and/or injury. For in-depth service information on SRAM products, refer to our website at www.sram.com/service. Information contained on SRAM Connect is subject to change at any time without prior notice.REAR SHOCK DAMPER SHAFT - (INCLUDES SHAFT) - DELUXE ULTIMATE RCT (B2-C1), 2023+, 47.5-55MM