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Availability:
In Stock.
Arrives
Tuesday, Sep 29
Size: 8x12x3.5mm
Features
- Made of stainless steel
- Precise tolerances, sealed and dustproof design
- Replace the stock bushings with bearings
- Make your rig roll smoother
- Contains all the bearings for TRX-4M
- AGE RECOMMENDATION: Not for children under 14 years
Brand: INJORA
Material: Stainless Steel
Item dimensions L x W x H: 3.15 x 1.97 x 0.79 inches
Bore Diameter: 0.5 inches
Item Weight: 0.03 kg
Brand Name: INJORA
Bearing Number: 22
Bearing Type: Ball Bearing
Number of Items: 22
Part Number: TRX4M-03BK
Manufacturer: INJORA
Model: TRX4M-03BK
Item Dimensions: 3.15 x 1.97 x 0.79 inches
Bore Diameter: 0.5 inches
Item Weight: 0.03 kg
Item Thickness: 2.5 millimeters
Material Type: Stainless Steel
Compatible Lubricant: Grease
Specification Met: Oem
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Sep 29
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 8x12x3.5mm
Not sure the tolerance of these and I cannot tell the difference between these and the Traxxas branded set, so I will most likely get these again in the future. They make a 100% difference over the stock sealed bearings that come with the TRX-4M. Its a no brainer replacement, although I am stacking up with transmission bearings for some reason, we need a set with or without the transmission bearings, every set of gears comes with them anyway. If you get this set and expect to replace them all, be prepared to disassemble the entire car, literally. I've been replacing as I go, but I noticed that there are some that are more labor intensive than others. The front axle bearings, in particular. It took me some time to strip down, clean and reassemble the entire front end to replace these. The transmission bearings took some time too, so I saved those for when I rebuilt the transmission, they of course went in easily and worked very well over the stock bearings. I would and will buy these again and would recommend them to others, 100%
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Reviewed in the United States on October 18, 2023 by L D
Size: 8x12x3.5mm
The rig runs noticeably better with this bearing kit. Highly recommend.
Reviewed in the United States on May 3, 2026 by Mike B
Size: 8x12x3.5mm
These are a great upgrade for your TRX-4M. They work and fit as they should they are cheaper than the Traxxas set. I will be upgrading all my TRX-4M with these bearings.
Reviewed in the United States on June 11, 2025 by Voodoo Jester
Size: 8x12x3.5mm
Night these for a new TRX4m I picked up. I swapped these in after running it for a few hours. The swap was really fun. It went smoothly and was a great way to get to know the truck inside and out. Some of the bushing took a fair bit of plying pressure with a small flat head to get then to eject, but none of the plastic housing were damaged in the process. After the swap the truck felt and sounded much smoother, and the throttle response was definitely improved. For the money this swap is a no-brainer. If you're intimidated by getting deep into your truck, don't be! Just get a clean work area and a good light and a how to video on YouTube and go for it!
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Reviewed in the United States on June 27, 2026 by Snack Dog
Size: 8x12x3.5mm
This improved the drivetrain smoothness 10x compared to stock brass bushings. I honestly didn't think these would make as much of a difference as they did, very smooth. I would assume this would just about double my battery life if the truck has been working this hard for over a year just to overcome bushing friction/resistance. This is probably the most cost-effective improvement you can make to your TRX-4M. Bearings fit perfect, and there was one for every single bushing on the truck.
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Reviewed in the United States on January 10, 2025 by Zach
Size: 8x12x3.5mm
Pretty simple to install, makes a huge difference in running quality highly recommend
Reviewed in the United States on May 3, 2026 by Uz
Size: 8x12x3.5mm
Injora products are the best. Perfect fit and easy to install.
Reviewed in the United States on January 8, 2026 by Samuel Ortega
Size: 8x12x3.5mm
Great price! Does indeed take the slop out of the driveline (going from memory, didn't exactly measure it) and feels good to know the tiny little car is now loaded with rolly rollers :) A few observations, however: * The bearings that go in the gearbox have a VERY tight fit with the two axleshafts which support two of the three gears. Swapping from low gear range to high gear range with bushings is an absolute breeze. Doing it with these bearings makes the task much more frustrating and easily doubles the time required * Some of the bearings seem to be out of tolerance the other way, the ID is too large. If memory serves the front axle was the worst offender. Not terrible but concerning * This might just be a thing, but the oilite bushings seemed to spin free-er. With front axles fully assembled, spinning any of the three exposed shafts with my finger was more effortless with the bushings than after putting in the bearings. So, we'll see how they do once they're worn in a bit. Maybe they'll glide a little smoother. For less than a 1/3 the price of the Real Deal, they're a steal. I think they're off the shelf jellybean whatevers all packaged together nicely (and that they are, which makes the task all that much less intimidating) Easy, only slightly time consuming install. Just buy the bearings for your stupid little car and get it overwith already.
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Reviewed in the United States on May 23, 2023 by BuyerOfThings