A strong choice for anyone replacing a worn 9-speed rear derailleur on a compatible mountain bike, hybrid or everyday utility bike.
The Shimano ALTUS RD-M370-SGS is a 9-speed rear derailleur designed for mountain bikes and hybrid bikes. It is a sensible replacement when you need reliable shifting performance without moving beyond a straightforward, easy-to-service drivetrain setup.
The long SGS cage supports a wide gear range, with compatibility for cassettes up to 34T and a stated 45T total capacity. That gives you useful low gears for climbs while retaining the flexibility needed for everyday riding, commuting and light off-road use.
Shimano’s light-action design is paired with Teflon-coated bushings and a wide link for smooth operation, adjustment and durability. Check that your bike uses a compatible 9-speed Shimano shifting system and cassette spacing before ordering.
9-speed drivetrain compatibility
Designed for 9-speed shifting systems, with Shimano/SRAM 9-speed cassette spacing.
Long SGS cage
The long cage helps accommodate a broad gear range and is suited to larger 9-speed cassettes.
Up to 34T rear sprocket
Supports a largest stated cog of 34T, giving compatible bikes useful climbing range.
45T total capacity
Provides substantial chain-wrap capacity for drivetrains using a wide spread of gears.
Light-action shifting
The light-action design helps keep gear changes smooth and easy at the shifter.
Wide-link construction
The wide link is designed to support durability and precise shifting.
Weather-conscious design
Double servo-pantograph technology helps maintain adjustment and resist contamination.
Straightforward replacement
A practical black replacement component for compatible 9-speed MTB and hybrid setups.
General
Shimano is a Japanese component brand founded in 1921 in Sakai, Osaka. The company began with bicycle component manufacturing and has grown into a global business focused on bicycle components, fishing tackle and rowing equipment, while keeping its headquarters in Sakai.
In cycling, Shimano is best known for building complete component ecosystems that span road, mountain, gravel, commuting and e-bike use. Its range covers drivetrains, brakes, wheels, pedals, shoes and related parts, and the brand has had a long presence in Australia through a local business established in Sydney in 1992.
