GPM Racing 40CR Steel Planetary Ring Gear for Traxxas 1/7 Unlimited Desert Racer-85076-4 (UDR041TS)
We are the importer of record — the price you see is the price you pay.
Handled by us in the UK under the Consumer Rights Act — no sending it overseas.
What our customers say
A selection of recent five-star reviews, as written.
-
★★★★★
Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.
Robert, 22 September 2026
-
★★★★★
Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.
Anna Abbott, 17 September 2026
-
★★★★★
Excellent service speedy delivery and good customer service
GLYN, 10 September 2026
-
★★★★★
Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.
Paul Jordan, 3 September 2026
-
★★★★★
Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!
Oliver Galustian, 23 July 2026
-
★★★★★
Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.
Simon, 19 July 2026
-
★★★★★
Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍
Mark Clucas, 30 January 2026
-
★★★★★
The customer service and advice were first class!
Steve Avery, 9 September 2025
-
★★★★★
The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.
Pete Goddard, 15 April 2025
-
★★★★★
Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.
Graham Rousseau, 10 February 2025
Key Specs
- Scale
- 1/7
- Weight
- 21 g
About this product
Precision 40Cr Planetary Ring Gear for UDR 1/7
This planetary ring gear is supplied as a precision aftermarket spare for the TRAXXAS Unlimited Desert Racer 1/7 platform. Machined from 40Cr carbon steel and finished with a supplier-specified hardening black surface, the component is intended to increase surface wear resistance when compared to the original part. It installs into the planetary carrier as a single replacement gear for the listed TRAXXAS chassis.
Installation requires gearbox disassembly and removal of the planetary carrier to exchange the ring gear. During service, inspect bearing fits and carrier surfaces, confirm gear mesh and axial runout, and verify clearances; correct alignment and bearing support are critical for consistent transmission load distribution and long-term durability. The product is supplied as the single ring gear without additional fixings.
Packing includes
- Planetary ring gear – 1pcs
Original Name / Part No:
8585
Compatible Models
- TRAXXAS-1/7 UNLIMITED DESERT RACER PRO-SCALE 4X4-85076-4
- TRAXXAS-1/7 UNLIMITED DESERT RACER-85086-4
Use this 40Cr hardened ring gear for precision replacement or when upgrading worn drivetrain components; verify mesh, runout and bearing condition during reassembly to maintain gearbox performance in 1/7 TRAXXAS applications.
Which UDR chassis will accept this part?
This part is specified to fit the TRAXXAS-1/7 Unlimited Desert Racer Pro-Scale 4X4 85076-4 and the Unlimited Desert Racer 85086-4 listed in the compatibility box.
What are the material and surface treatment details?
Material is 40Cr carbon steel; the component receives a black hardening treatment post-machining to increase surface hardness and resistance to wear in gearbox contact zones.
What is the package content?
The Packing includes section specifies a single planetary ring gear as delivered. No additional hardware is included.
Recommended inspection steps during fitment?
Inspect carrier bores and bearing fits, measure axial runout, set pinion and ring mesh accurately, and confirm bearings rotate freely under load to ensure even stress distribution and minimal noise. Write Product Review Please sign in your account before you can write any review.
Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.
What our customers say
A selection of recent five-star reviews, as written.
-
★★★★★
Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.
Robert, 22 September 2026
-
★★★★★
Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.
Anna Abbott, 17 September 2026
-
★★★★★
Excellent service speedy delivery and good customer service
GLYN, 10 September 2026
-
★★★★★
Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.
Paul Jordan, 3 September 2026
-
★★★★★
Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!
Oliver Galustian, 23 July 2026
-
★★★★★
Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.
Simon, 19 July 2026
-
★★★★★
Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍
Mark Clucas, 30 January 2026
-
★★★★★
The customer service and advice were first class!
Steve Avery, 9 September 2025
-
★★★★★
The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.
Pete Goddard, 15 April 2025
-
★★★★★
Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.
Graham Rousseau, 10 February 2025
