The M8100 chain provides enhanced chain retention thanks to an extended portion of the inner plate. The new chain features quick-link assembly and SIL-TEC treatment for extended offroad durability.
**The 126 link chain is discontinued. The 138 link chain is new for 2023.
- Series: Deore XT M8100
- Type: HG
- Speeds: 12-speed
- Roller link plate: Sil-Tec
- # of links: 138
- Quicklink: XTR SM-CN910-12
- Rear Derailleur: Shimano 12-speed rear derailleurs
- Cassette: Shimano 12-speed cassettes
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.
To request a return, please visit: returns.thundermountainbikes.com 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.
If you have any questions concerning our return policy, please contact us at:
Great chain makes a difference good interface between chain and XT cassette. The reason the Tittle is GENUINE XT cn-m8100 is because I've gotten a counterfeit from another supply in the past and the minute I popped a pin out of this chain to shorten it to the desired length I could tell it was the real deal. Very smooth-running chain!
Really can't say enough about XT. I decided to swap all of my bikes from SRAM to XT, and the shifting is totally silent and immediate. I did have to warranty my first XT derailleur but all of the new ones have worked stellar. I guess we will see about longevity in time. But as far as set up, shifting quality and lack of noise, XT over SRAM in my opinion(and I mean all SRAM models). Make sure to measure the chain at Sag to get proper length and you'll be all set. The dealer manual on Shimanos website is fantastic, and it has a step by step of installing a full drivetrain. Highly recommend reading it. There are some quirky differences between XT and XTR and 1x vs 2x as far as set up.