Deore XT BL-M8100 Disc Brake Lever
Deore XT BL-M8100 Disc Brake Lever

Deore XT BL-M8100 Disc Brake Lever


Regular price$56.99
  • In stock, ready to ship
  • Inventory on the way
  • Free shipping on all orders $49+

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


  • 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 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 6 reviews
Awesome Bike Shop

Orders are shipped quickly and accurately. What more could you want!

A must do upgrade if you have low end levers

My Giant Trance X come with MT-420 4 piston brakes and levers, however the levers are very hard to press, specially on bike parks it leave my hands with pain. I just changed the lever for the XT, and I leave all the rest and the change is amazing, is day and night how much it improve the braking just with a soft press. Just be sure you do a bleeding to remove all the air from the system. Total installation time 20min per brake. Thanks.

Fast shipping and great product availability

Had a hard time finding a Shimano brake lever. Thunder Mountain had it and shipped super fast! I was back riding in no time!

Leon Mercedes
Shimano xl8100 lever

Brand new, as described. Good price, quick delivery. Thank you.

Chip Riggs
Thunder Mountain Bikes came through for me...

I went down on a rooty, technical climb and destroyed my front brake lever blade. Thanks to the pandemic finding a replacement was harder than I imagined it would be but thankfully Thunder Mountain Bikes came through with a full, genuine Shimano replacement. I couldn't ask for more with their speedy shipping and great communication. I'll definitely be buying from them again. 🙌🙌