Rear wheel off set?

[UltraOrange67-2443]

Just changing my wheels and wondered what the widest back space I can run with a short axle.

I've been looking at using a 8" rim, I had 7" with a 3 3/8" back space and had plenty of room between the tyre and spring plate.

The wheel I fancy has a 5" back space, anyone running something like this?

Cheers, Nick

[bedjo78]

I am running 4in backspace . axle 5 " shorter . and the valve covers just an inch from tires  ( pauter engine ).  i cut the valve cover 1/2" to gain some space.

[Mike Lawless]

My son's car had 8" wheels with 4" back space. With 275/50X15 tires, it was close. Close enough to not be able to use adjustable spring plates. But those tires were 10" across the tread, and the cross section had to over 11".
I reckon it would depend on the tires you wanted, but at the very worst, you may have to run a wheel spacer. That's not as bad as some might think. If a custom spacer was made that fit around the studs closely, it wouldn't be an issue whatsoever.
Besides, if you look at custom disc brakes, many have a "hat" that fits over the hub that in essence is a wheel spacer. You can tailor the spacer to fit the wheel exactly where you wanted it.

I say go for it

[UltraOrange67-2443]

My son's car had 8" wheels with 4" back space. With 275/50X15 tires, it was close. Close enough to not be able to use adjustable spring plates. But those tires were 10" across the tread, and the cross section had to over 11".
I reckon it would depend on the tires you wanted, but at the very worst, you may have to run a wheel spacer. That's not as bad as some might think. If a custom spacer was made that fit around the studs closely, it wouldn't be an issue whatsoever.
Besides, if you look at custom disc brakes, many have a "hat" that fits over the hub that in essence is a wheel spacer. You can tailor the spacer to fit the wheel exactly where you wanted it.

I say go for it

Thanks
I've got 245/60 Hoosier quicktimes, they measure about 10" across.
I've got standard spring plates, I don't mind having a spacer made so the wheel sits perfectly in the wing.
I have grp 6cm wider wings.
Cheers, Nick

[leec]

I think a 5 inch backspace is too large. Also those Hoosiers balloon out a little from the rim profile too so it will be that hitting first, not the wheel width. Also a space effectively adds wheel width the wing end too

Lee

[UltraOrange67-2443]

Found out 4.625" is the most backspace you can run with a short >66 axle!

[Mike Lawless]

Found out 4.625" is the most backspace you can run with a short >66 axle!

That means a .375" wheel spacer. Not too bad. Just need longer PRESS IN studs, and although generic "one size fit all bolt circle" would work, if it were me, I'd go for a spacer that fit close around the studs.

I still say go for it

[Zach Gomulka]

Found out 4.625" is the most backspace you can run with a short >66 axle!

That depends on your brake offset as well!

[UltraOrange67-2443]

Found out 4.625" is the most backspace you can run with a short >66 axle!

That means a .375" wheel spacer. Not too bad. Just need longer PRESS IN studs, and although generic "one size fit all bolt circle" would work, if it were me, I'd go for a spacer that fit close around the studs.

I still say go for it

I've gone with a 7" rim with a 4.5" backspace just to be safe, I'm going to get some spacers made to size that bring the wheel out a little to fill the widened wings.

I may get rear discs again in chevy pattern or have some drums drilled and fit 12mm x 1.5 press in studs and open nuts.

Cheers, Nick.