There's more ride-ons out there then we can make specific modifications for. We can't advise on what parts specifically to buy when we haven't had the car in our shop. But if you're handy you can put our existing modifications into most cars. Once purchased we will give support to help you achieve fit but can not guarantee success and these kits are not returnable. Please read the How To Guide before planning your build to avoid frustrations and wasted money.
Cars with 1 gearbox: These have proven to be expensive and frustrating to modify. We highly recommend starting with a car designed for 2 gearboxes.
12v Cars with 2 gearboxes: Most of the off-brand cars seem to have no problem with upgrading to 18v. You can physically put our 18v Conversion Kit or Lithium Module in them as a start. You'll need to get a Male Power Wheels Connector with the 18v Conversion Kit. If the motors overheat you can upgrade them with our 550 Performance motors. Just be sure to get the same pinion gear tooth count that your stock motors had. If your electronics fry you can replace them with our Electronic Speed Controller.
Extra Large Cars: Our experiences with modifying cars over 90lbs and watching customers attempt to modify them have been fruitless. We don't have recommendations on how to modify them.
4WD Cars: So long as they are not over 90lbs we have had customers use our Electronic Speed Controller with reported success. We've never tested it ourselves so can't warranty for this kind of use.
Using Different Tires: Swapping tires is very difficult in this industry. Each tire mounts differently. Some mount directly to the gearbox. Some mount to a wheel adapter. Then you have to consider the tire's diameter, offset, depth, and hubcap fit. You may wind up needing a different length rear axle too. For the tires we sell we've linked the matching hupcaps/wheels.
Gearboxes: We offer our Phoenix Gearboxes, the only ride-on gearboxes specifically designed for durability at higher-then-stock levels of speed. They will directly fit where any Power wheels #7 or 7R gearbox fit. All other cars may need to do some trimming / fabricating to sit them in place. We offer a solid rear axle (7/16") and hollow rear axle (7/8") option based on what your car uses.
Motors: Our Performance 550 motors are faster than any stock ones and can run at up to 20v on the vehicles we designed them for. If you're wanting to run 24v you'll need to change to our Performance775 motors. 775 motors are a larger diameter so you'll need to make sure they'll fit your gearboxes. They mounting screws are also larger and spaced further apart so you will need either the 550 to 775 Universal Mounts or 550 to 7R / Phoenix Motor Mounts.
Pinion Gears: The pinion is the gear that attaches to the motor. If you're changing motors then you'll need to select the same pinion gear tooth count that your stock motors have. Stock ones are not re-usable. If your pinions are not 32 pitch you will need to find a source for them. 550 motor pinions are different than 775 motor pinions and not interchangeable.
Lighting: If your car is 12v or more you can use any of our lighting products (see the Lighting category). If you're over 12 volts be sure to get one of the voltage reduction modules.