Thanks,
One rainy day I plan to finish my other project like this only using a fake 3rd dimension with the car.
I posted this one for the gleam chance of it encouraging me.
You could add a hinge. You could also loop the chain around the gear a few more times after changing the collision, but this will exponentially increase lag.
It's a simple design. I didn't use anyone else's designs for this tire. Any similarity is pure coincidence. Besides, I made soft tires before you even started playing phun.