Shimano Acera RD-M3020 7-8 Rear Booster The RD-M3020 rear derailleur from Shimano's Acera range is used on 8-speed or select 7-speed mountain and city bikes.

Compared to the RD-M360 model, the wide compatibility is worth emphasizing: the total capacity is 45 teeth, so that the largest gear of the cassette can have a maximum of 40 teeth.

A maximum of 12 teeth is possible on the smallest gear.

The rear derailleur impresses with precise, fluid gear changes that are reliable even on rough terrain.

It is mainly made of steel and has a cable adjuster.

The pulleys have 11 teeth.

Specifications: Model: RD-M3020Spool Cage: SGS (long) Number of Gears: 8/7Total Front Difference: 20DTotal Capsite: 45ToothRuble Bottom Gear Max: 40ToothRuble Bottom Gear Minumum: 30DRuble Top Gear Max: 11ToothRuble Top Gear Minumum: 12Tooth Compatible Shift Levers 8 Pieces: SL-M360-R, SL-M310-8R, SL-M315-8R, SL-RS47-8R, SL-RS45-8R, SL-RV400-8R, -M310-8R2, -M310-8R4, -TX800-8R, -EF65-8R2, -EF65-8R4, -EF500-8R2A, -EF500-8R4A, -EF510-8R2A, -EF510-8R4A, -EF505-8R Compatible Cassettes 8 Pieces:11-40 T: CS-HG400-811: CS-HG51 -8, CS-HG41-8, CS-HG31-811-32 T: CS-HG51-8, CS-HG41-8, CS-HG31-811-34 T: CS-HG41-8, CS-HG31-812-32 T: CS-HG200-8 Compatible Chain 8: CN-HG71, CN-HG40 Compatible Shift Levels 7: SL-M310-7R, SL-M315-7R, SL-RS47-7R, SL-RS45-7R, SL-RS36-7R, SL-RS35-7R, SL-RV400-7R, SL-RV300-7R, SL-RV200-7R, SL-FT55-7R, SL-TX50-7R, SL-TX30-7R, SL-TZ500-7R, SL-TZ20-7R, -EF65-7R2, -EF65-7R4, - EF500 - 7R2A, - EF500-7R4A, - EF510-7R2A, - EF510-7R4A, - EF505-7R, - EF41-7R Compatible Cassettes 7-Piece: CS-HG200-7 (12-32 T) Compatible Chain 7-Piece: CN-HG71, CN-HG40 Specifications: Dual servo rear derailleur for smooth and precise shifting performanceSoft shifting even on rough terrainWide compatibilityGear cable adjusterFlor coated articulation bushingFlush shifter pulley screw Scope of delivery: 1 Shimano Acera RD-M3020 Rear Transmitter Black 7/8V Biggest Front Difference :Mirror arm is the difference between the number of large leaf teeth and the number of small leaf teeth