well done mate. Yeh the numbers etc are the tyre size, max air pressure allowed, radial info etc.
I just typed in Google tyre tread patterns chilledout...or you could go to the tyre manufacturers websites and get them from there. You could then just grab a section in PS and repeat the pattern over the UV...make a bump or normals out of it and apply.
cheers bullet
https://www.google.com.au/search?q=ty...w=1440&bih=739
bullet1968
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes