Shimano CUES RD-U4010 Rear Derailleur - 9/10-Speed Shadow Design Direct Attach Short Cage BLK MFPN=00.7915.064.050 It performs best with a

It performs best with a 28mm tire and using wider lower-pressure tubeless tires not only increases speed but also smooths the ride helping athletes stay fresher for the run

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Shimano CUES RD-U4010 Rear Derailleur - 9/10-Speed Shadow Design Direct Attach Short Cage BLK MFPN=00.7915.064.050 It performs best with aThe Shimano CUES RD U4010 rear derailleur has a compact cage design that is optimized to provide plenty of ground and tire clearance while maintaining smooth shifting performance for small wheel bikes. Compatible with Shimano 9 Speed (11 36t) and 10 speed (11 39t) LINKGLIDE cassettes only Shimano Shadow RD technology allows more aggressive riding with its super low profile design that prevents the rear derailleur from hitting the chain stay in rough