






⚡ Power Up Playtime with Speed & Torque!
This 2-piece 12V RS550 motor gearbox set offers a high-speed 40000 RPM motor with a 12mm shaft diameter, designed as a universal upgrade for kids’ electric ride-on cars like Power Wheels. It includes two gearboxes, couplers, and motor cables for easy, no-weld installation, delivering enhanced torque and performance to keep young drivers zooming with confidence.



| ASIN | B0D54M1H77 |
| Best Sellers Rank | #72,178 in Toys & Games ( See Top 100 in Toys & Games ) #61 in Kids' Ride-On Replacement Parts |
| Brand | POLYNX |
| Brand Name | POLYNX |
| Customer Reviews | 3.8 out of 5 stars 85 Reviews |
| Horsepower | 45 Watts |
| Included Components | 2 Gearboxes, 2 Adapters, 2 Motor Cable |
| Item Dimensions W x H | 3.71"W x 4.6"H |
| Item Height | 4.6 inches |
| Item Type Name | Gearbox |
| Manufacturer | POLYNX |
| Material Type | Plastic |
| Model | White Coupler |
| Model Name | 12V RS550 40000RPM |
| Product Dimensions | 3.71"W x 4.6"H |
| Shaft Diameter | 12 Millimeters |
| Speed | 40000 RPM |
| UPC | 782331890009 |
| Voltage | 12 Volts |
C**S
Works well
Works well
M**W
Wouldn't recommend unfortunately.
Purchased these 11 days ago. Had them installed for about a week. My son had maybe two hours total worth of drive time with them and it seems either the motors are shot or the gear boxes are shot. Was nice while it ran. The motors are both hot to the touch, smell of melted plastic and tires no longer spin and the hub no longer spins. Not happy with this purchase at all. Wouldn't recommend.
E**Z
very good
very good
A**R
Great Product
Very good quality and easy to install to replace old units on power wheels.
J**.
Good
Good 👍
J**B
Check your RPM
Perfect fit for the CAR rock truck obviously I just got them and installed them so no idea on the longevity!! I’ll probably have to change the motor back to the 11000 because the 40000 is way too fast, but it was one of the only ones that gave the proper measurements. I think the 11000 rpm is an odd rpm for these ride on’s, because of the small tires! I chose to solder the connections because the factory plugs were different! Anyway know that the rpm on this motor is FAST!!
S**N
Doesn’t work.
As soon as I got them installed I noticed that it only goes in reverse, will not go forwards at all, so I wasted time and money and will be having to put the originals back on.
D**N
Hold on tight!
Cheap power wheels upgrade and super easy to install. Hold on, this will turn that power wheel into a rocket, especially with a a Milwaukee 18v conversion
Trustpilot
1 month ago
3 weeks ago