Use this adapter to put Kid Trax, Roll Play, and other brand using hex adapters onto Power Wheels 7R style gearboxes.

Other DIY modifications to your vehicle may be needed to fit different tires or gearboxes then what they came with.

Hex side is 65mm across
Total depth of driver is 33mm
Center axle is 7/16" (.437)

One required per gearbox. Order 2 if you have 2 gearboxes in your car.