EVO is the pinnacle of TRP's engineering and development history, crafted in collaboration with the world's leading riders and teams. EVO builds on TRP's first-generation features, such as the Hall Lock, silent clutch, and cage release, to enhance both performance and user experience.
The Hall Lock technology greatly reduces drivetrain noise, allowing riders to stay focused and undistracted.
The EVO12's instant and silent clutch minimizes unwanted chain slap, further reducing the noise the shifting system produces. With the cage release, wheel removal becomes a breeze.
These advancements are complemented by the redesigned shifter, boasting improved ergonomics and a shaft mode switch, which lets riders choose between a single upshift click or a sweep of up to five upshifts per click. The result is a precise, efficient, and almost silent shifting system. To top it all off, carbon or forged alloy crank arms are matched with 1x chainrings featuring WaveTM tooth profiles that securely hold the chain in place even on the roughest terrain.
Experience the power of choice with EVO12.
Features
Integrated Hall Lock Lever
- Stabilizes the rear derailleur to eliminate unwanted drivetrain noise
- On/Off Feature to facilitate easy wheel removal and servicing
- Adjustable clamping force for breakaway optimization
Horizontal Parallelogram
- Stabilizes the rear derailleur while riding over rough terrain
Instant, Silent Clutch
- Prevents unwanted chain slap and rise
Cage Release
- Releases cage spring tension
- Facilitate easy wheel removal and maintenance
Carbon Fiber Outer Cage
12T/14T Sealed Bearing Pulleys
Compatibility:
The TRP RD-M9050-L rear derailleur is compatible with the following:
- Chain: TRP CN-M9050-12 chain
- Shifter: SL-M9050-12R Evo shift lever
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 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.
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 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.
QUESTIONS ABOUT RETURNS?
If you have any questions concerning our return policy, please contact us at:
