Can anyone tell me what width on 16 rims on a 91 camaro w/ 25 anniversary wheels? I think the rears are 16x8 but what are the fronts?

And can anyone tell me a good wide tire size is for the rear 16's? and a good tire size for the front 16's?

 

16x8's all around, although the backspacing is different front to rear so make sure you have them on the right end.

There are really only 3 tire sizes made that will fit on a 16x8" rim,

235/55/16 Stock on RS's
245/50/16 Stock on Irocs and Transams
255/50/16 Stock on mid 80's Vetts

The 235's and 245's fit fine with no problems, the 255's are a little taller and wider and will rub at full steering lock.....which a lot of guys have problems with on the stock 245's. I myself dont' think it's a problem and just don't crank the wheel clear to the bump stop and hold it there. The 255's look good and fill the fender wells a bit better than the 245's. The only wider tire made is a 275/50/16 BFG TA which is WAY too wide for 8" rims and looks like ***.