Shimano Tourney RD-A070 Rear Derailleur - 7 Speed Short Cage BLK Shimano Rear Direct Mount Overall Length (mm)-194 Ring Position/Type Chain Retaining Single

Ring Position/Type Chain Retaining Single RingTooth Count 42Drivetrain Speeds 11Drivetrain Speeds 12Round or Oval RoundChainring BCD 107Material AluminumColor BlackWeight 81Defined Color Black

5Shoe Size (US) 15Shoe Size (US) 15

And that muscle is needed when zipping around cars and corners at full pace

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}Avid Shorty Ultimate Arm Spring Service Parts Kit Red Cover

Shimano Tourney RD-A070 Rear Derailleur - 7 Speed Short Cage BLK Shimano Rear Direct Mount Overall Length (mm)-194 Ring Position/Type Chain Retaining SingleShimano Tourney RD A070 Rear Derailleur 7 Speed Short Cage Black Shimano Rear Direct Mount. Shimano Tourney RD A070 Rear DerailleursSmartcage design with 11 13t pulleys allows for short cage and a 28t max low cog TECH SPECS Largest Cog 28 Color Black Rear Der Shifter Compatibility Shimano Mountain Rear Derailleur Mount Type 10x1 Standard Drivetrain Speeds 7 Chain Wrap Capacity (teeth) 37 Cage Length Short