Shimano Deore BR-M6120 Disc Brake Set - 4 Piston - Thunder Mountain Bikes
Shimano Deore BR-M6120 Disc Brake Set - 4 Piston - Thunder Mountain Bikes

Deore BR-M6120 Disc Brake Set - 4 Piston


Regular price$155.99
  • In stock, ready to ship
  • Inventory on the way
  • Free shipping on all orders $49+

Shimano Deore BR-M6120 Disc Brake Set - 4 Piston

Shimano's Deore BR-M6120 disc brake set includes the BL-M6100 brake lever and BR-M6120 4-piston caliper. With quicker brake engagement and shorter free stroke, the Shimano Deore BL-M6100 brake lever delivers intuitive braking so you can stay focused on the trail ahead. The Shimano Deore BR-M6120 caliper features consistent braking performance and reliable stopping power in all conditions. The 4-piston caliper instills greater downhill confidence and control.


Shimano BL-M6100 Disc Brake Lever

  • Model No: BL-M6100
  • Series: Deore M6100
  • Mount: Clamp band
  • I-SPEC EV compatible

Shimano BR-M6120 Disc Brake Caliper

  • Model No: BR-M6120
  • Series: Deore M6100
  • Pistons: 2
  • Mount: Post mount
  • Brake 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 depending on your location. 


Effective Nov 19, 2021, for all online orders placed on or after Nov 19, 2021.

Note: For all orders placed before November 19th.  Please see the old Policy here.

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 delivery date. 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.  If you are unsure if your item qualifies for a return.  Please email us first:

Return shipping charges will be paid for by the customer. 

As a convenience, we can send you a pre-paid return label. The return shipping charge will be deducted from your refund when using our pre-paid label. Return shipping rates are as follows:  

  • Bicycles: Customer pays the quoted amount. Please contact us.
  • Oversized (Kuat racks etc.): $40 per box
  • Wheels: $20 per box
  • Medium packages: $10 per box/envelope
  • Small packages (Grips, brake pads, etc.): $5 box/envelope

*Paid shipping charges will not be refunded.

Return Process

To return an item, please follow these steps:

  1. Email us at Please note the order number, the items that needed to be returned, and why.
  2. Once approved, we will notify you of the return label charge and email a pre-paid shipping label.
  3. Place the item in its original packaging, including all tags
  4. Pack the item securely to prevent any damage on its return trip.
  5. Drop the item off at your local post office.


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. Paid shipping charges will not be refunded. 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.


We do not accept Exchanges. Instead, return the item as outlined above and place a new order for the item you would like to purchase. This will get the item into your hands weeks faster than an exchange would.


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 3 reviews
Deore BR-M6120 Disc Brake Set - 4 Piston

This is a great Brake set, but the best part is dealing with Thunder Mountain Bikes, they are awesome. Great customer service at it's best, can't be beat and Mike Curtin and Ryan D are incredible. I am happy Customer and forever a Customer.

Edward M Brechka
Shimano Deore BR-M6120 4 piston Disc Brake Set

These brakes have fantastic stopping power for the price. Great upgrade.
Awesome experience dealing with Thunder Mountain Bikes.
Fast shipping and fantastic customer service.
Great to do business with them!!!

Thank you so much for choosing to shop with us for your mtb needs! We're happy to help and glad you're enjoying your new break set!

DJ de Lara
Maybe overkill for XC but great for Downcountry or heavier riders!

I only have a squeaky cable pull and an entry-level Tektro M275 to compare this to. Besides overall stopping power, I feel that this has more modulation than the Tektros. The adjustable lever reach is also a plus. TMB also shipped this so fast, I thought it was a Prime delivery.

They also ship disassembled and is very easy to install except for the olive.

Sounds like these were a great upgrade for you! We're stoked it got to you so quick, too. Cheers!