TheBurlyMan

iTrader: (1)

I am wanting to widen my factory gmc 20's 1.5" to make them a 20X10. Of course the extra width will be added to the inside of the wheels. First, will that fit? I have measured and it seems that is no problem. Biggest part is can i fit 315/35R20 toyo proxes on the rear without rubbing. Again this is all only on the rear tires

Atomic

iTrader: (42)

Pretty sure the stockers are 7.5 so you need at add 2.5 to the inside, and no, they will not fit without a spacer.

TheBurlyMan

iTrader: (1)

The stock 20's measure out at 8.5" wide. Spacer as in moving the wheel further out? That might look bogus....

Plus guys here seem to fit 305/50R20 tires on factory width wheels without rubbing and that is even more confusing because thats a much taller tire...?

Atomic

iTrader: (42)

Ah, the 16s and 17s are 7.5, I guess they changed it for the 20s. Yes, move it further out. When I had my 17s widened to 10" the rim would hit the leaf spring, not even including the tire. Width is much harder to fit than height.

TheBurlyMan

iTrader: (1)

Still looking for a definitive answer on this widening of wheels and 315 tire fitment before i spend a bunch of money... Appreciate any opinions/experience

tiffo60

iTrader: (2)

seems to me you could measure from your hub to your leafs and see how much room you have to grow?

TheBurlyMan

iTrader: (1)

From the leaf spring to the factory tire edge is approx. 3in To the wheel edge is approx. 5in

tiffo60

iTrader: (2)

sounds like you have room to grow

62nalide

iTrader: (1)

the 315/35/20 fit without widening them
https://www.performancetrucks.net/fo...2012-a-494470/

and stock 20s are 8.5"
http://www.finishlinewheels.com/spec...28SET+of+4%29/