Shimano XTR BL-M9120 Disc Brake Lever - Thunder Mountain Bikes
Shimano XTR BL-M9120 Disc Brake Lever - Thunder Mountain Bikes

XTR BL-M9120 Disc Brake Lever


Regular price$114.99
Shipping calculated at checkout.
  • In stock, ready to ship
  • Backordered, shipping soon
  • Free shipping on all orders $59+

Shimano's XTR trail lever pairs with the new 4-piston trail caliper offering rider-tuned stopping power for the ever more capable breed of modern mountain bikes. With tool-free reach adjust and Shimano's new I-spec EV standard, the BL-M9120 lever continues to set the standard for mountain bike brakes.


  • Model No: BL-M9120
  • Series: XTR M9120
  • Mount: Clamp band
  • I-SPEC EV compatible
  • Olive, barb, and brake hose are not included


  • Brake caliper: BR-M9120 4-piston
  • Lever blade: BL-M9120 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   |

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Customer Reviews

Based on 7 reviews
John H. (Martinez, US)
Stiff, but very constraining on placement.

This lever/mc assembly appears as if it only requires about 17mm of bar width to mount. This is not the case. It really requires 43mm of bar width to mount. There is an additional boss on the back of the unit, which needs to contact the handlebar tube. This is done to stiffen up the assembly, which works very well. The angle of the photos that Shimano has chosen hides this boss. There needs to be a photo taken from the backside and/or top, so it can be seen. In my application I had to cut a 3 x 8mm hole in the front of the grip for the boss to go through. This uses up about 25mm of width of the grip that can no longer be used by your hands.

Jay H. (Cary, US)
Awesome levers to replace Magura MT5s

Decided to give Magura MT5s a go on my new bike. The MT5 levers were really inconsistent. They would fade during a ride. At times I would get on them and the levers would flex to the point that I would squeeze my middle finger between the lever and grip. I read that you could swap Magura levers for Shimano and use with the Magura 4 piston calipers (google "Shigura") and so I decided to give it a try.

Both use mineral oil and the Magura hyraulic cables fit the Shimano levers so the swap out was pretty easy. You will need to order the Shimano BH90 Hose Bolt and Fitting Unit (Olive, bolt and barb) as they don't come with the levers.

Man, what a difference. The XTR levers are rock solid. Totally different riding experience. Stops on a dime, no fading or inconsistency. Install and bleed was simple if you have the right bleed kit(s) and a hydraulic hose cutter.

Great ordering experience from Thunder Mountain. Ordered on Sunday. Shipped on Monday from Az. Arrived in NC on Friday. Highly recommend!


Exactly what I was looking for.

You may also like