Shimano Deore FC-MT520 Chainring Set – 170 mm, 34 Teeth, Boost-Compatible
The Shimano Deore FC-MT520 is a single-chainring crankset designed for 12-speed drivetrains. It features a direct-mount chainring with a 170 mm arm length and a 34-tooth ring, optimised for modern mountain bike and gravel setups.
170 mm crank arms provide a balanced gear ratio for versatile terrain
34-tooth chainring delivers efficient cadence across mixed gradients
Boost-compatible axle width for modern frame spacing
What sets the FC-MT520 apart
Built as part of the Deore groupset, this crankset combines Shimano's proven durability with a straightforward single-ring setup. The 24 mm axle diameter and Boost compatibility make it a straightforward upgrade for frames designed around modern standards.
Ideal for
Mountain bikers and gravel riders running a 12-speed Shimano drivetrain who want a reliable, no-fuss single-chainring solution. The 34-tooth ring suits riders who need a balanced gear spread for both climbing and flat sections without the complexity of a double or triple setup.
Application of the Shimano Deore FC-MT520
Install the crankset onto a frame with a 24 mm bottom bracket axle
Ensure the direct-mount chainring is fully seated and torqued to specification
Pair with a 12-speed Shimano Deore or compatible rear derailleur
Verify Boost spacing (60 mm) on the rear hub before riding
Shimano is a Japanese manufacturer specialising in cycling components, founded in 1921. The company produces a full range of drivetrain, braking, and shifting systems for road, mountain, and gravel bicycles. Deore is Shimano's mid-range mountain bike groupset, offering reliable performance at an accessible price point. The FC-MT520 crankset is part of this lineup and is widely used in entry-level to mid-range mountain and gravel builds.
A single-chainring crankset from Shimano's Deore mountain bike groupset, with 170 mm crank arms and a 34-tooth direct-mount chainring.
It requires a 24 mm bottom bracket axle and Boost-compatible rear hub spacing (60 mm). Check your frame's bottom bracket standard and rear axle width before purchasing.
170 mm crank length, 34-tooth chainring, direct-mount interface, 24 mm axle diameter, Boost-compatible, 12-speed chain compatibility.
The crankset with the 34-tooth chainring, crank arms, and spindle. A bottom bracket is not included and must be purchased separately if not already fitted.
24 months of manufacturer warranty from the date of purchase, covering material and manufacturing defects.
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