Shimano Tourney RD-A070 Rear Derailleur - 7 Speed Short Cage BLK Shimano Rear Direct Mount Overall Length (mm)-194 A built-in push button quick

A built-in push button quick release system provides cable slack for quick wheel removal or additional tire clearance when conditions get muddy

Color Black Flat Protection Sidewall TPI 60 Weight 873 Defined Color Black ISO Width (mm) 58 ISO Diameter 584 / 650b / 27

Seat Weight (lbs/kg): 7

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

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

Shimano Tourney RD-A070 Rear Derailleur - 7 Speed Short Cage BLK Shimano Rear Direct Mount Overall Length (mm)-194 A built-in push button quickShimano 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