For those of you who have made these cakes, do you have tutorial, instructions or pictures on how to make wheels?

Thanks a bunch!

anyone?

Most use either cookies or doughnuts, depending on the size needed.

This is a picture of the chassis for my nephew's toy car smash cake. (Sorry about the fuzziness.)
I used 8 Oreos; 4 under the car, 4 for the tires.

I made a tractor and used rice krispie treats molded and then covered in black fondant....looked very realistic!

I made mine from RTK too. I cut them out with a big round cookie cutter, then pressed the bottom of a 1/2 cup measuring cup to make the center. I covered them in black fondant, then used the back of a knife to press in the v's to make the treads.

Jodie

You can use modeling chocolate. Roll it out fairly thick (3/4inch) and cut it out with a circle cutter.

I used little chocolate covered doughnuts from the grocery store! They were perfect!

Thank you all so much