Shimano RD-M3020 Acera Rear Derailleur - 7/8 Speed -

Shimano RD-M3020 Acera Rear Derailleur - 7/8 Speed


Regular priceRs. 1,780.00
Tax included. Shipping calculated at checkout.

ACERA RD-M3020 7/8-speed Rear Derailleur
The Shimano ACERA RD-M3020 7/8-speed rear derailleur provides smooth and precise shifting performance and a wide-range capability. The SHIMANO ACERA M3020-8 rear derailleur with Double Servo technology helps you ride challenging terrain with fewer interruptions.

Features - Shimano ACERA RD-M3020-8

  • Double Servo construction for smooth and precise shifting
  • Versatile performance and wide compatibility
  • Quick assembly
  • Allen key type inner cable fixing bolt
  • Max. large sprocket: 40T
  • Total capacity: 45T

Product features

  • Use: MTB, Trekking
  • Group: ACERA M3000
  • Model: RD-M3020-8
  • Mount Type: Direct Mount
  • Technology: Top Normal
  • Gear: 7/8-speed
  • Compatible Chain: HG 7/8-speed
  • Max. teeth large sprocket: 40T
  • Min. teeth large sprocket: 30T
  • Max. teeth small sprocket: 12T
  • Min. teeth small sprocket: 11T
  • Max. Front Difference: 20T
  • Total Capacity: 45T

Pulley cage

  • Type-SGS long


  • Aluminum
  • Steel


  • black

Scope of delivery

  • 1 x Shimano ACERA RD-M3020 7/8-speed Rear Derailleur


Double Servo
SHIMANO’s double servo-panta mechanism enables the rear derailleur to move in an optimum path. The guide pulley tracks the cogs closely while moving front to back, optimizing each shift. Perfect tracking contributes to the most accurate SIS shifting. Keeps rear derailleur guide pulley an optimum distance from each sprocket. Keeps rear derailleur guide pulley an optimum distance from each sprocket.

Customer Reviews

Based on 7 reviews
Acera rear derailleur

Good and original product

Brendon Marwein

I upgraded from a Shimano Altus and I gotta say the Acera is way smoother and faster in shifting. Overall i am satisfied with the product and the quick shipment. Keep it up CYCLOP!!!

Deepak Shetty
Loved it

Received Orginal
Working super fine on my hero sprint howler

Nurul Hassan
Nice product

Good one ....!

Prasanth Jose

I converted a cheap hybrid bicycle I bought for 12k to a 1X8 system using the RD-M3020 derailleur and the CS-HG400-8 cassette. I use this bicycle for my daily commute of around 12km since July, 2022. So far it has not missed a gear, not gone out of alignment. When coupled with Shimano SL-M315 8 speed shifter, the shifts are surprisingly smooth and precise.
My bicycle is a 700c bicycle with 28mm tyre. The crank is 38 teeth. On the highest gear it provides 92 gear inches for high speed riding and on the lowest gear 25 gear inches for climbing. It is not as fast as a road bike for high speed riding and not as good as an MTB for climbing. But it offers good compromise between them and excellent for city commuting.

Awesome products at lowest prices

The products are genuine and at lowest rates and delivery is prompt

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