They fly all over the place. After sitting and rotting from Fall to Spring on the trailer, once on the road in the Summer they go flying!

Watch out for the road gators!

Alas, no.

When the original tyres came to the new world and displaced native tyres, they suffered heavy mutations in their spDNA, turning them into tires. This, unfortunately, devastated their migration ability. Now, we have to change them out in fowl weather and store them in the garage.

only after driving off a south-facing ramp

No, my tyres don't fly south anymore.
They used to, but the food was strange, and you couldn't find bleedin' Watney's Red Barrel anywhere.