SRAM XX1 Jockey Wheels BlackBox Ceramic Hybrid Bearing X-Sync 11speed SRAM XX1 JOCKEY WHEELS BLACKBOX CERAMIC HYBRID BEARING X-SYNC 11SPEED The SRAM XX1 Jockey Wheels are made from a BlackBox Ceramic material with hybrid bearing pulleys. Made for the 11-speed SRAM XX1. Sram XX1 Jockey Wheels Blackbox Ceramic Hybrid Beaing X Sync 11 Speed Features 11 speed Ceramic
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