Shimano Deore XT BL-M8100 Disc Brake Lever - Thunder Mountain Bikes
Shimano Deore XT BL-M8100 Disc Brake Lever - Thunder Mountain Bikes

Deore XT BL-M8100 Disc Brake Lever


Regular price$56.99
Shipping calculated at checkout.
  • In stock, ready to ship
  • Backordered, shipping soon
  • Free shipping on all orders $59+

With a focus on reduced weight and advanced stopping power, the Shimano Deore XT BL-M8100 lever provides intuitive modulation so that you can explore your limits with confidence. The BL-M8100 XT brake lever is compatible with both 2-piston and 4-piston Deore XT brake sets (M8100, M8110, M8120).


  • Model No: BL-M8100
  • Series: Deore XT M8100
  • Mount: Clamp band
  • I-SPEC EV compatible
  • Olive, barb, and brake hose are not included


  • Brake caliper: BR-M8100 2-piston, BR-M8110 2-piston (flat mount), BR-M8120 4-piston
  • Lever blade: BL-M8100 Lever Member Unit
  • Brake hose: SM-BH90-SBM
  • Oil: Shimano Hydraulic Mineral Oil

Please reach out to us with any questions you may have on anything we sell. We want to make sure you get the right items 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 $59 are eligible to ship for free via an economy ground option of our choice.

Most bikes ship free within the continental US. Bike shipping to AK, HI, or PR is $250.

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.

Component & Gear Returns

Returns may be requested within sixty (60) days of the delivery date. All returned items must be received in new, unused, and uninstalled condition, with the original tags and labels attached and in the original packaging. We cannot accept returns on any items installed or show wear of any kind.

Bike Returns

Returns or exchange requests for bikes must be requested by emailing us at within fifteen (15) days from the date of delivery. Bikes must be in un-ridden condition. Custom-built bikes may not be returned. Returned bikes have a $200 restocking fee and the customer pays for return shipping.

Return Shipping

Customers may choose to use our provided flat-rate return shipping label at $9, or choose a carrier of their choice to handle their product return.

The $9 flat rate label will be deducted from the refund issued for the return. You can either print this label after requesting a return from the Order History in your Account profile, or you can request that we email you the label.

For all other return shipping methods, please email us at after submitting your return request so that we can confirm the shipping information you should use to return your item(s).


We will process your return after we receive your returned item(s) and inspect the condition. Please allow at least seven (7) days from the receipt of your item to process your refund. We will notify you by email when your return has been processed.


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


To request a return, please log in to your customer account by clicking the customer account icon Profile icon in the top right of any page or visit

1. In the Email field, enter your email address and click Continue.

2. In your email account, open the email sent from our store and copy the six-digit verification code included in the email.

3. Go back to the online store and enter a six-digit verification code to log in.

4. Find and click on the order that you want to submit a return for.

5. If your order has more than one item, select only the items you want to return.

6. Select a return reason and add a note for the store if needed.

7. Click Request Return.

Once your return request is approved, you will receive an email with shipping instructions and a return shipping label.


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

(928) 282-1106   |

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Customer Reviews

Based on 22 reviews
Charleston t.F.H. (Westminster, US)
Brake lever

This product is amazing. It has a lever that you pull which puts pressure on the hydraulic fluid (sold separately) that is contained within the lever and the hydraulic lines. When you do so, it "communicates" , wirelessly, to the brake caliper. The caliper takes that signal and begins to compress brake pads that are either resin based or semi-metallic onto the metal brake rotor causing speed to be lost in a manner that is directly proportional to the force applied by you, the user, on the lever. This little gem has a texture applied to the blade of the lever that doesn't add much grip for your phalanges, but it sure looks spiffy in 7 different ways to Tuesday. I would recommend this lil ditty to anyone needing to replace a Shimano lever or to convert your set of Magura brakes into the better Shigura brakes.

Osvaldo M. (Orlando, US)
Lever upgrade

Great upgrade from tektro levers... feel and adjustability

Reginald C. (Memphis, US)
Great Service

Fast Shipping, great price, extremely happy!

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