Help!!! (tires and wheels)

Hey guys i have a quick question. I am drawing a dodge power wagon concept with a lift and all. and i cant draw treads on the tires. also how do you make the wheel look like its turned i like how that looks

Thanks alot,
Max Parkinson

Here is a link for tires and wheels

http://www.drawthrough.com/tutorials/index.html

I like to draw the minor and major axis, and focus on the negative space b/t the ellipses. Study, study, study, tires/rims and then draw, draw, draw. Sketch tons of ellipses. Study tires and rims in the parking lot. Take your drawing pad and go sit next to a car at the mall and draw, nah just joking. I am always observing cars every where I go. I also like to look how the sun and objects reflect off the car. Be an observer, but don't wreck either.

al

thanks, but also i cant make the wheels look like they have any depth
i