And yet, as they are so awesome I need to point out one thing to make them even increase their awesomeness.
The large wheels do not have a smooths surface, they have a surface similar, but finer, to the slopes. So they do not produce a reflects as strong as it is seen especially in the back wheel.
I already thought about that, but as there is no ldraw color for that type of grainy surface, I would need to deal with two types of grainy surfaces (slope ones and wheel ones) which will not be convenient.
Sorry but it will stay like this for the moment. Thanks anyway for pointing it out.