---
product_id: 643455065
title: "2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler"
brand: "polynx"
price: "272.69 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Polynx"
url: https://www.desertcart.tn/products/643455065-2pcs-kids-ride-on-car-gearbox-12v-rs550-40000rpm-high
store_origin: TN
region: Tunisia
---

# 12V High Voltage Power 12mm Precision Shaft Diameter 40000 RPM Ultra-High Speed 2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler

**Brand:** polynx
**Price:** 272.69 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Power Up Playtime with Speed & Torque!

## Quick Answers

- **What is this?** 2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler by polynx
- **How much does it cost?** 272.69 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/643455065-2pcs-kids-ride-on-car-gearbox-12v-rs550-40000rpm-high)

## Best For

- polynx enthusiasts

## Why This Product

- Trusted polynx brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Double the Value:** Two premium gearboxes plus free couplers and cables included, so you’re ready to upgrade both wheels or keep a spare on hand.
- • **Turbocharge Your Ride:** Upgrade your kid’s electric vehicle with a powerful 12V RS550 motor delivering blistering 40000 RPM speed for unmatched performance.
- • **Plug & Play Simplicity:** Includes motor cables and couplers for effortless installation—no welding or complex tools needed, get your ride back on track fast.
- • **Universal Compatibility:** Perfectly fits most Power Wheels and kids’ ride-on cars—just compare sizes and swap in for an instant performance boost.
- • **Built for Torque, Built to Last:** High torque gearbox designed to handle tough playtime adventures, ensuring smooth acceleration and reliable power delivery.

## Overview

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.

## Description

desertcart.com: 2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler : Toys & Games

Review: Works well - Works well
Review: 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.

## Features

- 2PCS 12 Volt Universal Motor Gearbox is Used for Power Wheels, Kids Electric Toys Car, Ride On Car Motor Upgrade and Replacement Parts
- The products include: two high-quality gearboxes, two white circular couplers, and two motor connection Cables
- Suitable for repairing and upgrading power wheels, please compare the size before purchasing, voltage: DC12V, speed: 40000RPM, shaft hole diameter: 12mm (0.48"); motor diameter: 35mm (1.39")
- With a coupler, you only need to fix the coupler to the tire to customize the installation.
- With cable, easy to install and disassemble, no need for electric welding

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 |

## Product Details

- **Brand:** POLYNX
- **Model Name:** 12V RS550 40000RPM
- **Speed:** 40000 RPM
- **Voltage:** 12 Volts
- **Horsepower:** 45 Watts

## Images

![2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler - Image 1](https://m.media-amazon.com/images/I/611-EzubgaL.jpg)
![2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler - Image 2](https://m.media-amazon.com/images/I/611hmaMk5hL.jpg)
![2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler - Image 3](https://m.media-amazon.com/images/I/61OzkbdoGyL.jpg)
![2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler - Image 4](https://m.media-amazon.com/images/I/61hj+L2oXJL.jpg)
![2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler - Image 5](https://m.media-amazon.com/images/I/71dKvZmlMUL.jpg)

## Available Options

This product comes in different **Model** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well
*by C***S on January 4, 2026*

Works well

### ⭐ Wouldn't recommend unfortunately.
*by M***W on October 14, 2025*

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.

### ⭐⭐⭐⭐⭐ very good
*by E***Z on January 2, 2026*

very good

## Frequently Bought Together

- 2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler
- 14PCS Set of Switch Kit for Power Wheels Kid's Ride on Toys Replacement Parts, Foot Pedal/Forward Stop Backward Shift/Push Button Power Supply/Reverse Handle Gear/High&Low Speed/Charging Port/Fuse

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---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-01-25*