Hmmm... the code looks correct. Does the tires behave correctly if you don't use any multiplayer code?

What exactly happens when you use the code you posted? Are the tires not moved on the other clients or are they moved wrong?

I saw that you commented the "if" out that makes sure that the code only runs on the client that created the entity. This is an important "if" and you need this! Otherwise the whole function is executed on all clients => all clients set the position of the wheels with their physic engine and don't use the sent positions.
Maybe that's the problem.

EDIT: Forgot to say that the homepage will be available this afternoon! You will be able to buy the Standard Version of ANet and get 2 new example scripts.