back spacing question

[byrd]

I need to know if 5.5" back spacing on a 17" rim is too much for out trucks?I think the rear would be fine,but I am worried about the front and have found a smokin deal on some wheels, but do not know if they will work or not... TIA...Randy

[byrd]

ttt

[Tx Firefighter]

Here's what I know...

a 17x8 with 5 inch backspace works on a lowered truck. In the back, the tires are 275/60/17, which is quite wide and they clear the bed fine. With the extra 1/2 of b.s. you'd want to run a tire that didn't bulge off the rim too much or it would rub for sure.

[SactoJim]

My first thought would be that is too much positive offset (assuming 8" wide wheel). you're only going to have 2.5 inches on the other side of the rim. Might look a little funny with it tucked that far into the wheel well.

How wide are the wheels you are looking at.

[Shock_Me]

Byrd,
Is it a stepside or a fleetside? There is a difference, ask me how I know.
Also, rearends from 67 to 70 are not the same width as the 71 - 72s.

On the front, I'm using 4.5" back space with 255/60R17 and they fit perfect.

Here's a shot from the back with 5" B.S. and 285/60R17s on a 9.5" wide rim
I'd say 5.5" would fit better with no chance of rubbing, but real close to the inside of the box.
That being said, a 5" back space on a 71-72 fleetside would fit perfectly.


Pete

[byrd]

Originally Posted by SactoJim

My first thought would be that is too much positive offset (assuming 8" wide wheel). you're only going to have 2.5 inches on the other side of the rim. Might look a little funny with it tucked that far into the wheel well.

How wide are the wheels you are looking at.

Yes they are 8" wide

[byrd]

Originally Posted by Shock_Me

Byrd,
Is it a stepside or a fleetside? There is a difference, ask me how I know.
Also, rearends from 67 to 70 are not the same width as the 71 - 72s.

On the front, I'm using 4.5" back space with 255/60R17 and they fit perfect.

Here's a shot from the back with 5" B.S. and 285/60R17s on a 9.5" wide rim
I'd say 5.5" would fit better with no chance of rubbing, but real close to the inside of the box.
That being said, a 5" back space on a 71-72 fleetside would fit perfectly.


Pete

67 fleetside, but it has a 71-2 rear end.

[whatnow123]

Originally Posted by Shock_Me

Byrd,
Is it a stepside or a fleetside? There is a difference, ask me how I know.
Also, rearends from 67 to 70 are not the same width as the 71 - 72s.

On the front, I'm using 4.5" back space with 255/60R17 and they fit perfect.

Here's a shot from the back with 5" B.S. and 285/60R17s on a 9.5" wide rim
I'd say 5.5" would fit better with no chance of rubbing, but real close to the inside of the box.
That being said, a 5" back space on a 71-72 fleetside would fit perfectly.


Pete

Hey Pete,

So do you have a ealier rear end or is it the later wider rear axle?

[Shock_Me]

It's a 71 rear axle. Right now if the truck bottomed out, the tires would probably rub. We will probably change the back rims to a 5.5" backspace to avoid this.

[67chevemall]

Originally Posted by Shock_Me

It's a 71 rear axle. Right now if the truck bottomed out, the tires would probably rub. We will probably change the back rims to a 5.5" backspace to avoid this.

Hey man you should do a thread on what tires and rims will fit these trucks with the different rear ends and Fleet side, Step side, and the Front I guess would be lowered heights.
I wish there was a store around here to "try on different set ups"
I am going to try 18" rims with the 275/35/R18 Dunlops sp sport8080E I guess 4.5-5 BS no sure yet.