Hi everyone looking to put a set of 17x8" in the front and 17x9.5" in the rear on my 91 stock suspension looking to get the widest tire i can in the rear without tubing it any suggestions

 

Personally I would run 245/45/17 on the 8's and 275/40/17 on the 9.5's.
A 295 would probably fit the rear just fine with the right offset but needs a wider wheel than 9.5" in my opinion.

 

Skip the 8" on the front and go 9.5" all around with a 275-40-17 tire on all 4 corners.

 

why stay 9.5 in the front im not worried about turning just going in a strait line

 

A square setup doesn't encourage understeer but if your going straight I guess that's not a problem :-)

 

What does this mean ?
I only ask because I've never heard it before.

 

75% of braking is done by the front tires on any vehicle. The wider the tire, the better the braking - plus the increase in handling anf turn-in.

The tiny speed penalty of a 275 up front more than offsets the ability of the car to go into a ditch or crash going around a turn. As someone else said, understeer is a concern.

 

If you only want to go straight, why not just use a 15" wheel and a good drag radial? More traction available with a 15