I just bought an 02 s10. I want to put 20`s on the back and 18`s on the front what size tire would you recamend for the best street look?  

Is it lowered or bagged? If it is lowered, how much? This will help to determine the size a little better.  

Its stock now ,but i am wonting to put a 4/5 drop on it but i havn`t looked into it yet.  

Hmm. Well, the next thing I was going to ask is whether or not you were planning on or willing to tub it. In terms of the stock wheelwells, I'm thinking 225s front and 255s or 265s rear. You should probably be able to squeeze those in the wheelwells.