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Bolt Circle Diameter: 86mm
be a superchamp
AND MAINTENANCE
great shifting and strong enough for world class riders
THE RIGHT SHIFTER CAN BE USED AS 6 SPEED INDEX OR AS A STANDARD FRICTION TYPE SHIFT LEVER
Shimano Acera RD-M3020 7 / 8 Speed Rear Bike Derailleur Direct Attachment Other Bike Maintenance & Tools Bolt Circle Diameter: 86mmShimano Acera RD M3020 8 Speed Rear Derailleur Acera mountain bike rear derailleur with light action operation and over size pulleys for a wide gear choice Oversize 13 tooth tension and guide pulleys to reduce noise and wear Extension spring and low friction fluorine coated link pivot bushing result in a light shifting action Double Servo rear derailleur with smooth, precise shifting performance and wide range capability. IG and HG chain, 7 and 8