low/high poly vehicle wheels?

[oldfaq]

hey,
anyone know of some "good" tutorials for either of these, Im pretty sure I can manage making low poly wheels its just hte high poly ones where you create the treads, I have found a tutorial but I can't seem to get it down right
oldfaq

 

[simon]

http://www.3dtotal.com/team/Tutorials/fiat500/fiat500_w1.asp