Engineered for smooth, high-performance shifting under pressure, the M8200 cassette is the latest advancement in Shimano’s HYPERGLIDE+ technology. With redesigned tooth profiles and a wide 10–51T range, it delivers fast, quiet, and precise gear changes across a massive 510% range. Micro Spline compatibility ensures modern drivetrain fit, while a mix of steel and alloy cogs balances durability and low weight for aggressive trail riding or endurance adventures.
Features:
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510% Gear Range: Shimano’s widest DEORE XT gear range offers maximum climbing power and versatility.
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Freehub Compatibility: Designed to work seamlessly with Micro Spline freehub bodies.
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Optimized Construction: Lightweight alloy and steel construction delivers long-lasting performance without the bulk.
XT M8200 Cassette Specs:
9-45t
| Model: | XT M8200 |
| Model ID: | CS-M8200 |
| Rear Speeds: | 12-speed |
| Range: | 500% |
| Cog Sizes: | 9-11-13-15-17-19-21-24-28-33-39-45t |
| Chainline: | 55mm |
| Freehub Interface: | Micro Spline |
| Technology: | Hyperglide+ |
| Material: | Steel, and alloy cogs |
| Drive Config: | 1x |
| Weight: | TBD |
| Installation Note: | Requires the Shimano TL-LR21 Cassette Tool for installation. |
10-51t
| Model: | XT M8200 |
| Model ID: | CS-M8200 |
| Rear Speeds: | 12-speed |
| Range: | 510% |
| Cog Sizes: | 10-12-14-16-18-21-24-28-33-39-45-51t |
| Chainline: | 55mm |
| Freehub Interface: | Micro Spline |
| Technology: | Hyperglide+ |
| Material: | Steel, and alloy cogs |
| Drive Config: | 1x |
| Weight: | TBD |
Compatibility
The Shimano XT M8200 Cassette is backward compatible with previous generation Shimano 12-speed chains and drivetrains. Compatible models include: XTR M9100 and M9200, Deore XT M8100, SLX M7100, and Deore M6100.
The XT M8200 Cassette is compatible with the following:
| Freehub: | Shimano Micro Spline |
| Rear Derailleur (9-45t): | Medium Cage: XT RD-M8200-GS |
| Rear Derailleur (10-51t): | Long Cage: XT RD-M8200-SGS |
| Chain: | 12-speed HG: XTR M9100, Deore XT M8100, SLX M7100, Deore M6100 |
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!
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 will have an additional shipping fee.
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 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 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 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 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 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.
EXCEPTIONS
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.
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:
