WIP Dodge Nitro Help

This is a dodge nitro i have been working on, i really fu**** up the tires, and am havin trouble fixin them, i want some nice meaty tires but with big flashy rims, if some one could help me that would be awsome! And also i would love some feedback, what i should do differntly and what i should add. Thanx

Original:
http://img244.echo.cx/img244/9305/dodgenitroconcept200501m1pv.jpg (http://www.imageshack.us)

Chopped: as you can see the tires are messed up
http://img222.echo.cx/img222/2295/dodgenitroconcept200501m6nh.jpg (http://www.imageshack.us)
Mods:
Color
Lifted some
carbon fiber hood and bumpers
taillights
billet grille
mesh in side vent
shaved door handles
billet gas door

The carbon looks fake because the fibers are too big. You shouldn't be able to tell that something is carbon from this distance. Also, you wouldn't use carbon around the bottom of the truck due to the fact that it is easily damaged. Can you make the tail lights a little smaller too?

I don't know if it will work,
Select the area around the tire which will be in contact with the road, and use the smudge tool to make it look like a slick tire. If you want, leave the thread in the middle and a few others and use them as reference to make new threads with the pencil tool?? enjoy :p
I don't know if it will work, or it will get your work f***** up.
And yeah, your carbon fibre is too big but is a very good one, do you have tutorials? any websites or tips?

thanx for the tips and yea the website i used to learn is http://www.digimods.co.uk/tutorials/tutorials.htm its got a good cf tut in there