Shimano Tourney RD-TY300B 6/7-speed Rear Derailleur long hub attachment

New Shimano Tourney TY-300 derailleur for 6 and 7-speed MTB bicycles. Reliable and precise shifting. Double Servo Panta mechanism, with quick and easy assembly. - Direct frame mounting for bicycles without a derailleur hanger. - Large cog: 34 teeth maximum and 28 teeth minimum. - Small cog: 11 teeth minimum.