Deore XT SL-M8100 Shift Lever
Deore XT SL-M8100 Shift Lever

Deore XT SL-M8100 Shift Lever


Regular price$62.99
Rear Speeds
  • In stock, ready to ship
  • Inventory on the way
  • Free shipping on all orders $49+

Shimano's RapidFire Plus DEORE XT shift levers deliver light and responsive shifting for improved control out on the trail. The new I-SPEC EV lever offers a wide range of adjustments including increased lever slide range. Available in both I-SPEC-EV and 22.2mm clamp. Shimano Optislick derailleur cable included.


  • Model No: SL-M8100
  • Series: Deore XT M8100
  • Weight 117 grams (22.2mm Clamp), 120 grams (I-Spec EV)
  • Mount: 22.2mm bar clamp, I-SPEC EV
  • Max multiple shifts: 4
  • Rear speeds: 12
  • Shifter type: Rapidfire Plus


  • Rear derailleur: Shimano 12-speed rear derailleurs


    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.

    Returns or exchange requests for New or Used 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.

    Returns for most other items 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. 

    Clearance and open-box items may not be returned. 


    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. 


    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.


    If you have any questions concerning our return policy, please contact us at:

    (928) 282-1106   |

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    Customer Reviews

    Based on 3 reviews
    Michael Rodacker
    Works great

    Easy install and it shifts well. Ordering through Thunder Mountain Bikes is easy and quick. One of my go to sites for MTB

    Tom L
    Excellent shifter!

    Fast shipping, no problems, excellent!

    Aaron Leighton
    Upshifting Options Worth the Upgrade over SLX

    Love the multi-shift option and Instant Release when upshifting. Definitely worth the upgrade in my opinion. Expected XT quality construction and nice paddle texture, too. I have the i-Spec version, which makes for an extra-clean looking bar setup.