Shimano FC-MT520 Deore 12-Speed Chainset
- 2-piece 12-speed design
- HollowTech II bottom bracket system
- 12-speed HG MTB chain compatibility
Shimano FC-MT520 Deore 12-Speed Chainset is a tough, good value MTB chainset built for modern 12-speed trail and all-mountain drivetrains. Its 2-piece design, forged crank arms and HollowTech II bottom bracket system help deliver strong power transfer with low weight. The 55mm chain line also makes it suitable for bikes with 148mm O.L.D. rear spacing.
Key Features and Benefits:
- 2-piece 12-speed design: The 2-piece construction joins the right crank arm and axle into one unit. This helps reduce weight, improve stiffness and give the chainset a solid feel under load.
- HollowTech II bottom bracket system: HollowTech II uses a large axle diameter and wide bearing placement. This improves stiffness and pedalling efficiency, so more of your effort reaches the rear wheel.
- Forged crank arms: The forged arms are shaped under high pressure to improve strength and rigidity. This gives the chainset the durability needed for trail and all-mountain use.
- Lightweight all-mountain build: The FC-MT520 is made to handle aggressive riding without adding excess weight. This helps keep the bike responsive on climbs, turns and rough ground.
- 12-speed HG MTB chain compatibility: This chainset is made for use with 12-speed HG MTB chains only. The correct chain match helps support smooth drive and reliable drivetrain function.
- 55mm chainline for 148mm O.L.D. frames: The 55mm chain line is designed for bikes with 148mm rear spacing. This helps keep the chain in the right position for modern Boost-style MTB setups.
The FC-MT520 suits riders who want a strong and efficient chainset for a 12-speed mountain bike build. The stiff crank arms, wide bearing stance and large axle design help support steady power delivery. Its durable build also makes it a practical choice for regular trail use.
Choose the Shimano FC-MT520 Deore 12-Speed Chainset for a strong, efficient and reliable drivetrain upgrade. For the best fit and long-term performance, the bottom bracket should be installed by a bike shop to ensure correct facing and alignment.
| Chainring Size | 30T, 32T |
| Crank Arm Length | 165mm, 170mm |
| Brand | Shimano |
| MPN | FCMT520AA0, FCMT520AA2, FCMT520CA0, FCMT520CA2 |
Our Payment Options
Online we currently accept payment from the methods listed above including a wide range of finance options. In store we also accept payment in the form of cash and gift vouchers.
Finance Options
In order to get the kit you want, when you need it, we offer a highly flexible range of finance options to help you get the best products on your bike now rather than at the end of the season when you've saved up the cash to make the purchase. There are even interest free options which effectively spread the cost without costing you any extra.
D.T.(Automotives) Limited T/A Tweeks Cycles is authorised and regulated by the Financial Conduct Authority and is the broker and not the lender. Our FCA registration number is 689896. D.T.(Automotives) Limited offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance, Klarna and Clearpay. Credit is provided subject to affordability, age and status. Minimum spend applies. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Klarna is unregulated credit. Clearpay is unregulated credit, use responsibly, T&Cs & late fees apply.
Our Finance Providers
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D.T.(Automotives)Limited trading as Tweeks Cycles offer interest free and interest-bearing credit on purchases £300 and over which is provided by V12 Retail Finance.
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We also offer Klarna, pay now, pay in 30 days or pay in 3 equal instalments.
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We also offer Clearpay pay in 4 instalments.
UK Mainland Delivery Prices
| Delivery Type | Cost | Estimated Delivery Time |
| Standard Delivery for orders under £49.99 | from £1.33 | 2-3 working days from day of despatch(Excludes weekends and Bank Holidays) |
| Standard Delivery for orders over £49.99 | Free | |
| Bike Delivery | Free | 3-5 working days from day of despatch *(Excludes weekends and Bank Holidays) |
| Express Delivery | from £1.68 | 1-2 working days from day of despatch(Excludes weekends and Bank Holidays) |
| Special Delivery | from £12.54 | For any next working day delivery order before 4.30pm Monday to Thursday. For any weekend delivery order before 4.30pm Friday |
* Bike Delivery Info
A bike has to go though a Pre Delivery Inspection (PDI Check) prior to despatch, ensuring the bike is thoroughly checked and set up prior to you receiving. This also means an express delivery service is unavailable. We strive to despatch bikes within 3-5 working days. Please note this may change over school holidays and the festive season (November/December). For more information on the process please visit our pre-build page.
For international shipping please visit our delivery page.
For information about returning an item please visit our returns page.