Algodoo

Just horrible because the tires are not perfectfly round....but I think the idea is the important thing.
It's your first but it's very realistic I think.

4/5

Yea, I meant horrible as in it isn't perfectly round. Thanks for the feed back, though. I am currently improving it.

for a first tire

hey its pretty good!
u wanna know how to make them perfectly circle?
1) make a circle(or whatever you are using to make the wheel)
2) clone it, bring the clone straight down(this is the diameter of the wheel)
3) select both objects
4) hold down ctrl, and hold down the left mouse button until it shows the sheep sign for clone, but DONT MOVE IT!
5) let go of ctrl
6) let go of the left mouse button
7) right-click on the two clones and rotate them.
8) repeat steps 4-7 until your circle is finished!
hope this helps!