[Geradmg]

Let me see if I can make sense with this one. Right now I have a tubbed out nova with 15x12 wheels with a 5.5" back space. I am running Hoosier Quick time D.O.T. 31x16.5 tires with 14" tread width. As they stand right now I am have plenty of room for back spacing. From the inner fender to the bulge on the sidewall that sticks out the most I have 2" of clearance. The tread already clears just fine. My tires accept a 12-14" wide wheel. With the 12" wheels the tires have a pretty big sidewall bulge so I wanted to go with a set of 15x14" wheels for the back. The wheels I want only come in a 6" backspace. I think my clearance will be fine since with the 2" wider rim it will take away some of the sidewall bulge and still leave me with the same or maybe a little more clearance especially since the tread is 14" wide and clears fine now. Do you think I am right or do you think it's not going to fit?

[C-10]

So, the 6" backside on the new wheel puts it 1/2" closer... Now add another inch on the inside and outside for the 14" wheel. That's 1-1/2" closer on the inside. Will it fit now?

The sidewall won't change dramatically, so you'd best do some measuring. Take into account of how much these big rollers will grow at speed also.

Best of luck.

[burnt olds]

with that change , you will have 1/2 more on back , but will add 1 1/2 to outside .
fender well rub unless you have at least 2 inches room now with 12 inch, giving you 1/2 clearance , with the 14 inch wheel .

[Geradmg]

So really for a 14" I really need to have atleast 7 to 7.5" back spacing in order for it to work?

[C-10]

From the inner fender to the bulge on the sidewall that sticks out the most I have 2" of clearance.

If this is clearance to the inside, what is the clearance to the outside? Move the wheel towards the bigger number.

[Geradmg]

I easily have another 7 inches from the side wall of the tire to the wheel tub on the back side. So yeah I have alot more back spacing to work with than up in front. I wanted to do some greg welds but they have that backspacing amount. The billet street lights go up to 7.5 back spacing and the torque thrusts go up to 7" but the greg welds were also alot cheaper. I guess I could order one from summit and see if it fits without the tire and then if it doesn't send it back. The 2" is from the sidewall not even the rim and the tire/sidewall bulge sticks out alot more than the rim itself