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Shimano Acera RD-M3020 7/8-Speed Rear Derailleur Black, 40t Max
Black, 40t Max
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Shimano Acera RD-M3020 7/8-Speed Rear Derailleur

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MSRP: $33.99
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Description

The Shimano Acera RD-M3020 7/8-Speed Rear Derailleur offers light shifting operation and over-sized pulleys for a wider gear choice; compatible with 7- and 8-speed drivetrains.

Features:

  • Double Servo construction for smooth and precise shifting
  • Versatile performance and wide compatibility
  • Low sprocket: 30-40T
  • High sprocket: 11-12T
  • Total capacity: 45T

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

Specifications

Mfg PartNum: ERDM30208SGSL 

Actuation: Mechanical 

Mount Type: Standard Rear Hanger 

Speed: 7/8 

Reviews

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Reviewed 1/19/2023
by Jody
Cycling Enthusiast
Ohio
Value Rating
Overall Rating
shift smooth for lectric bike

I bought this after the on on my lectric bike failed. such a big difference i shifting and so smooth for the price.

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Reviewed 8/6/2019
by KC cyclist
Cycling Enthusiast
Kansas City area
Value Rating
Overall Rating
2 of 2 customers found this review helpful.
One of the most used 7-8 speed derailleurs

Better than the entry level Shimano derailleurs and performs well. Quite durable, especially for the price. Typically used on $450-600 bikes and many e-bikes costing much more. Been around for a long time.

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Reviewed 6/21/2018
by Mick
Cycling Enthusiast
Huntsville, AL
Value Rating
Overall Rating
2 of 2 customers found this review helpful.
Went on very easily and adjusted quickly.

The tech I spoke with was very knowledgeable and helpful. He spoke bicycle. Tech made useful suggestions about the product to buy and best order to swap out parts.

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