William and Samuel_Anjam:

You are both correct. Ulillillia is correct too but not in the same way. My intentions here for when I slapped these quick textures together:

They are not for loading up into WED for the texture library to be directly applied to a model. Noone would ever do this for a wheel anyway lol.

Also, these textures are sources for your wheel/ car's UV Map. You can scale them to any size you wish and crop tileable parts onto your map. The size of the UV map is up to you, 128, 256, 512. The tyre texture can be any size so that doesn't need to be a power of two. Noone is going to actually have a tyre model on its own. You would have a wheel and have tyre texture and rim texture etc.

Hope this helps .

P.S. Any 'none modeller' who wishes for me to explain better, let me know . It's very easy to understand .