What size tires would I need to put on a rim 19x8.5 in front and 19x9.5 in back?? Also not making the tire look as if it were stretched.

 

you can try using 235/35(or 30 i forgot) for the front and 245 for the back.

you are using staggered wheels? is your car quatro?
cos i heard that if your car is a 4 wheel drive then it is not advisible to use staggered wheels. it will damage the 4-wheel drive system.
thats what i heard.

Edwin

 

It will definately damage the quattro system if you use a wheel/tire combination that has different circumference front vs rear. Different circumferences means different axle rpm which would look like front/rear wheel spin (all the time)

235/35 has a sidewall height of 82.25mm
245/40 is 98mm
255/30 are 76.5mm

Trying to find combinations is very hard (probably impossible)

For a quattro, put on four wheell/tires that are the same