GPM Racing Steel 12T Pinion Gear - 2pcs Set for Traxxas 1/10 TRX4 (TRX4012T)
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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
- 1/10
- Weight
- 10 g
About this product
Precision 12T steel pinion for TRX4 applications
Engineered as an aftermarket upgrade for the TRAXXAS TRX4 Trail Crawler platform, this 12T pinion is produced for hobbyists seeking a robust steel option. The component is supplied as a pair and is machined to deliver repeatable tooth engagement under crawling loads while maintaining dimensional accuracy for straightforward fitment.
The pinion fastens to the motor via the included 3×3 screw shaft and transmits torque into the drivetrain. Source dimensions are a center bore of 3.175mm, 12T tooth count, pitch 32, and tooth spacing of 0.8mm; these values should be used to confirm spline and spur compatibility before installation to ensure correct alignment and longevity.
Professional fitting advice: confirm motor shaft diameter of 3.175mm, match the 0.8mm pitch spur, fit the pinion and secure with the supplied 3×3 screw shaft, then set precise gear mesh and measure endplay on the bench. Proper initial setup reduces noise and wear and ensures predictable torque transfer in low-speed, high-torque crawling scenarios.
Packing includes
- 3×3 Screw Shaft – 1pcs
This item is compatible with
- TRAXXAS TRX4 Defender Trail Crawler
What tolerance should I expect on the central bore?
The supplied specification lists a 3.175mm middle hole; verify actual shaft and bore fit with a caliper and allow minimal radial clearance for correct press alignment.
Is additional heat treatment applied?
The material is specified as hardened #45 steel to provide improved wear resistance; no further heat treatment details are provided in the source data.
What checks should I perform after fitting?
After securing the pinion with the 3×3 screw shaft, verify gear mesh across several rotations, inspect for binding, and confirm endplay to prevent early tooth loading and wear. 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
