Shimano BR-MT520 Disc Brake Caliper - Thunder Mountain Bikes

BR-MT520 Disc Brake Caliper


Regular price $62.99 Sale price$54.99
Brake Pads
  • Low stock - 1 item left
  • Inventory on the way
  • Free shipping on all orders $49+

Shimano BR-MT520 Disc Brake Caliper - 4 Piston

With a strong, 4-piston design, the Shimano MT520 hydraulic disc brake caliper boosts rider confidence and enjoyment.


  • Model No: BR-MT520
  • Pistons: 4
  • Mount: Post mount
  • Included brake pad: D02S Metal
  • Fits front or rear brake


  • Brake Lever: BL-MT501
  • Brake hose: SM-BH90-SS
  • Oil: Shimano Hydraulic Mineral Oil
  • Brake Pads: D02S metal, D03S resin


Please reach out to us with any questions you may have on anything we sell. We want to make sure you get the right part the first time. Our lifelong riders at Thunder Mountain Bikes are knowledgeable and would love to talk to you!


We currently offer both economy and expedited shipping options though FedEX and USPS. 

Orders totaling over $49 are eligible to ship for free via an economy ground option of our choice. 

If you're in need of something super-quick, please contact us directly. We may be able to overnight your order with an additional fee and depending on your location. 


Should there be an issue with the item you bought, or you no longer need your purchase, we will be happy to set up a return.

All returns must be requested within sixty (60) days of the fulfillment date (i.e. the date we printed the shipping label and boxed up your order.) All returned items must be received in new and unused condition, with the original tags and labels attached, and in the original packaging.  We cannot accept returns on any items that have been installed or show wear of any kind. 

Return Process

To request a return, please visit: and follow the steps to return eligible items from your order. 


After receiving your return and inspecting the condition of your item, we will process your return. Please allow at least seven (7) days from the receipt of your item to process your return or exchange. We will notify you by email when your return has been processed.

For all Special Order items, there is a 25% restocking fee. Special Order items are those that we do not currently stock.


For defective, damaged, or if we sent you the wrong products, please contact us using the phone number or email below.

Other questions?

If you have any questions concerning our return policy, please contact us at:

(928) 282-1106   |

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Customer Reviews

Based on 2 reviews
Bill Kephart
Shimano Brake Caliper

Order was delivered as scheduled. Would definitely order from Thunder Mountain again!!!!

Eugene S
Perfect for brakes for my HT

Swapped my 2 piston to these 4 pistons brakes and the braking power is much better. Thunder mountain is great and I always buy from them