Shimano BR-MT520 Disc Brake Set - Thunder Mountain Bikes
Shimano BR-MT520 Disc Brake Set - Thunder Mountain Bikes

BR-MT520 Disc Brake Set


Regular price $144.99 Sale price$117.99
Brake Pads
  • Low stock - 2 items left
  • Inventory on the way
  • Free shipping on all orders $49+

Shimano BR-MT520 Disc Brake Set - 4 Piston

Shimano's BR-MT520 disc brake set includes the BL-MT501 brake lever and BR-MT520 4-piston caliper. The BL-MT501 brake lever delivers high-powered mountain biking Servo Wave performance and I-spec II compatibility. With a strong, 4-piston design, the Shimano BR-MT520 hydraulic disc brake caliper boosts rider confidence and enjoyment.


Shimano BL-MT501 Disc Brake Lever

  • Model No: BL-MT501
  • Series: Non-Series
  • Mount: Clamp band
  • I-SPEC II compatible

Shimano BR-MT520 Disc Brake Caliper

  • Model No: BR-MT520
  • Series: Non-Series
  • Pistons: 4
  • Mount: Post mount
  • D02S metal pads included


  • 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
Great customer service

I bought these brakes to upgrade from the mechanical set that came on my gravel bike. I ended up purchasing the wrong mounting point and contacted thunder mountain and they helped me out no problem! Sent me the return label the same day! Luckily my local bike shop swapped me for the correct ones so it ended up working out! Thanks thunder mountain!

Christopher Cowan
Excellent buy!

Upgraded from MT200 to the MT520 front and rear. I am thrilled with the performance, ease of setup, and the feel of the levers. This upgrade was exactly what my bike needed to be downhill capable. These brakes don't cause me to think about them while riding, but when they do my thoughts are, "these are awesome!!"
Thunder Mountain deserves all the kudos for getting the order processed and shipped to my destination address inside of a few days. Top notch customer service here!