Shimano DEORE FC-MT520 Crankset – Precision MTB Power Transfer
The Shimano DEORE FC-MT520 crankset is a purpose-built mountain bike drivetrain component designed for reliable, efficient power delivery across varied terrain. With a 170 mm crank arm length and 30-tooth chainring, it offers a balanced gear ratio for both climbing and cruising.
12-speed chain compatibility ensures smooth, precise shifting across the full cassette range
Boost-compatible chainstay width provides modern frame clearance and stiffer power transfer
24 mm axle diameter delivers durability and reduced flex under heavy pedalling loads
Single-chainring 1x drivetrain setup simplifies shifting and reduces drivetrain weight
What Sets the FC-MT520 Apart
As part of Shimano's DEORE groupset tier, the FC-MT520 bridges the gap between entry-level and high-performance MTB cranksets. The Direct-mount chainring interface eliminates the need for a separate spider, contributing to a cleaner look and more consistent chain engagement.
Ideal For...
Mountain bikers building or upgrading a 1x drivetrain on a Boost-compatible frame. Suitable for trail and all-mountain riding where a single chainring with a 12-speed rear cassette provides a wide gear range without the complexity of a 2x setup.
Application of the Shimano FC-MT520
Install the crankset onto a BB with a 24 mm axle diameter, ensuring the Boost chainstay clearance is met
Mount the 30-tooth chainring onto the Direct-mount interface
Thread the 12-speed chain through the chainring and rear cassette
Adjust the front derailleur limit screws and chain tension for optimal shifting
Shimano is a Japanese manufacturer specialising in cycling components, founded in 1921 and headquartered in Sakai, Osaka. The company produces a full range of drivetrain, braking, and shifting systems for road, mountain, and urban bikes. DEORE is Shimano's mid-tier mountain bike groupset, offering 1x and 2x drivetrain configurations with 10- to 12-speed compatibility. Shimano components are widely distributed across Europe and are a standard fit on bikes from numerous OEM and aftermarket brands.
A mountain bike crankset from Shimano's DEORE groupset, featuring a 170 mm crank arm, 30-tooth chainring, and 12-speed chain compatibility with a Direct-mount chainring interface.
Frames with a Boost chainstay width and a bottom bracket with a 24 mm axle diameter. The Direct-mount chainring interface requires a compatible BB and frame standard.
170 mm crank arm length, 30-tooth chainring, 12-speed chain compatibility, Boost chainstay width, 24 mm axle diameter, Direct-mount chainring interface.
The crankset with the 30-tooth chainring, Direct-mount spider, and 24 mm axle. A bottom bracket is not included and must be purchased separately if not already fitted to the frame.
Shimano offers a 24-month manufacturer's warranty on this product, covering defects in materials and workmanship under normal use.
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