The Deore XT M8200 2-piston Brake Upgrade Kit delivers precise, confidence-inspiring braking with a refined balance of power, weight, and durability. This set is ideal for XC and trail riders who demand consistency in all conditions.
A redesigned Servo Wave action ensures smooth, predictable brake control by optimizing the power curve and carefully managing pad-to-rotor friction throughout the lever pull. Combined with low-viscosity mineral oil, braking performance remains consistent across a wider temperature range.
Built for long-term reliability, the BL-M8200 features an alloy lever blade manufactured using Shimano's proven stamping process, while the alloy caliper body emphasizes strength and durability. Updated cable routing on the lever creates a clean, tidy cockpit aesthetic, rounding out a brake system that performs as well as it looks.
Features:
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2-Piston Alloy Caliper: Lightweight and powerful for XC speed and control
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Servo Wave Lever: Optimizes the power curve and manages pad-to-rotor friction throughout the lever pull
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Low-Viscosity Mineral Oil: Consistent bite point and smooth modulation in all temperatures
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Quiet Braking: Refined pad and caliper interface minimizes noise
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Pad Compatibility: Works with resin or metal pads for tuning your ideal brake feel
Details:
Kit Includes
| Brake Set: | Deore XT M8200 2-Piston, Left & Right brakes |
| Oil: | Shimano Low Viscosity Mineral Oil - 100ml (complimentary) |
Brake Set
| Model: | Deore XT M8200 2-Piston |
| Position: | Front/Left & Rear/Right |
| Caliper Pistons: | 2-Piston |
| Caliper Mount: | Post Mount |
| Brake Pads: | J04C-MF Metal (Installed) |
| Lever Mount: | 22.2mm Clamp |
| Shifter Mount: | I-Spec EV Compatible |
| Hose: | SM-BH90-SBM (Front: 1000mm; Rear: 1700mm)(Included) |
| Weight: |
The Front & Rear brakes are shipped pre-bled and include the lever, caliper, brake hose (not installed), J04C-MF Metal pads, and all fittings needed for installation.
Compatibility & Parts
The Deore XT BR-M8200 Brake Upgrade Kit is compatible with the following:
| Brake Pads: | J04C-MF, J05A-RF |
| Caliper: | Deore XT BR-M8200 2-Piston Caliper |
| Caliper Adapters: | Disc Brake Caliper Adapter |
| Lever: | Deore XT BL-M8200 Brake Lever |
| Lever Blade: | Deore XT BL-M8200 Lever Blade / Lever Member Unit |
| Hose: | SM-BH90-SBM Hose Kit |
| Olive & Barb: | BH90 Olive & Barb |
| Mineral Oil: | Low Viscosity Mineral Oil |
Please reach out to us with any questions you may have about 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!
Shipping
We currently offer both economy and expedited shipping options through FedEx and USPS.
Most orders totaling over $59 are eligible to ship for free via an economy ground option of our choice.
Due to larger box sizes, handlebars, and other oversized items, an additional shipping fee will be applied.
Most bikes ship free within the continental US. Bike shipping to AK, HI, or PR is available at an additional charge depending on the exact delivery location.
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, depending on your location.
RETURNS
Should there be an issue with the item you bought, or if 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 that have been installed or show wear of any kind.
Bike Returns
Returns or exchange requests for bikes must be requested by emailing us at sedona@thundermountainbikes.com 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 incur a $200 restocking fee, and the customer is responsible for the return shipping costs.
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 section in your Account profile, or you can request that we email the label to you.
For all other return shipping methods, please email us at sedona@thundermountainbikes.com after submitting your return request so that we can confirm the shipping information you should use to return your item(s).
REFUNDS
We will process your return after receiving your returned item(s) and inspecting their 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. All refunds will be returned to the original payment method. No store credit or other refund methods are available.
EXCEPTIONS
If you receive defective or damaged products or if we sent you the wrong item(s), please contact us using the phone number or email below.
RETURN PROCESS
To request a return, please log in to your customer account by clicking the 
Profile icon in the top right of any page or visit account.thundermountainbikes.com.
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 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.
QUESTIONS ABOUT RETURNS?
If you have any questions concerning our return policy, please contact us at:
