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Infinite Rate Tune (IRT) allows for advanced spring tuning by independently adjusting air pressures in the beginning and end stroke
Color Black Defined Color Black Flat Protection Tread and Sidewall ISO Diameter 622 / Road / 29" ISO Width (mm) 66 Labeled Size 29 x 2
8mm ID for 1
}Shimano Deore FC-M4100-2 Crankset - 175mm 10-Speed 36/26t 96/64 BCD For 48
microSHIFT M21 Rear Derailleur - 67 Speed Long Cage Black MFPN=SBK-1 Infinite Rate Tune (IRT) allowsmicroSHIFT M21 Rear Derailleur 67 Speed Long Cage Black. M21 rear derailleurs are designed to work with 6 and 7 speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs. Robust composite and steel construction Compatible with Shimano 6 and 7 speed mountain and road systems TECH SPECS Cage Length Long Chain Wrap Capacity (teeth) 43 Color Black Drivetrain Speeds 6 Drivetrain Speeds 7
