I've got an electric car for my kids, that only has hard-plastic tires with a slim ring in the middle.

I recognized the tire slip while brakind due to low friction, also they're quite loud.

So i designed this TPU ring with tractor tyre profile for silencing and enhancing the friction.

Also it adds a little comfort while driving due to the higher profile, TPU with gyroid infill for a little shock absorbing.

The ring can easily be resized within the slicer to fit your kids car.

100% is 220 mm outer diameter and 205 mm inner diameter and 22.72 mm height

Therefore its outer circumference is 691.15 mm and 644.026 mm inner circumference

If you take measurements, i would recommend to print it slightly smaller than the actual tire diameter, so get a tight fit around the wheel. Like really tight fit. Like you think it doesn't work and wished you'd have printed it bigger. That tight is perfect - or still too loose ;)