Shimano Acera Rear Derailleur RD-M3020 7/8-Speed
What Is It?
The Shimano Acera RD-M3020 is a mechanical rear derailleur designed for 7- and 8-speed mountain bike drivetrains. Featuring Shimano's Double Servo construction, it provides smooth, precise gear changes and reliable performance for recreational riding, commuting and off-road cycling.
Key Features
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7/8-speed compatibility: Designed for Shimano-compatible 7- and 8-speed drivetrains.
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Double Servo technology: Supports smooth and precise shifting across the cassette.
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Long cage (SGS): Accommodates a wide gear range for versatile riding.
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Wide cassette compatibility: Supports a largest rear sprocket of up to 40 teeth.
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Cable adjustment barrel: Allows convenient fine-tuning of gear indexing.
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Durable construction: Combines aluminium, steel and reinforced composite components.
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Conventional mounting: Attaches to a compatible derailleur hanger.
Specifications
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Specification
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Details
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Brand
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Shimano
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Series
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Acera
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Model
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RD-M3020-8
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Product Type
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Rear derailleur
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Speed
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7/8-speed
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Shifting Type
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Mechanical
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Cage Length
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Long cage (SGS)
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Compatible Chain
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Shimano HG 6/7/8-speed
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Maximum Largest Sprocket
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40T
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Minimum Largest Sprocket
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30T
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Maximum Total Capacity
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45T
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Maximum Front Difference
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20T
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Mounting
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Conventional derailleur hanger
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Colour
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Black
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Benefits
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Delivers consistent, dependable gear changes.
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Provides a broad gear range for climbing and varied terrain.
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Offers compatibility with common 7- and 8-speed drivetrains.
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Suitable for replacing a worn or damaged rear derailleur.
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Supports everyday cycling, recreational mountain biking and commuting.
Best Suited For
The Shimano Acera RD-M3020 rear derailleur is ideal for recreational mountain bikers, commuters and everyday cyclists looking for reliable mechanical shifting on a compatible 7- or 8-speed bicycle.
