Staggering backspacing on wheels?
Thread Starter
Burning Brakes
Joined: Oct 2020
Posts: 1,149
Likes: 265
From: The frozen wastes...
Staggering backspacing on wheels?
Okay, an interesting (well, to me...) issue here. I want to use my 295/50's all around. I'll switch that up down the road, but for now, i have the tires, and i like the look. My 8" rims fit nicely... (3.5" backspace), but they just dont want a 295 on them. So i'm gonna buy some 15x10" rims. Plan on 4" backspace up front, but i want the rears to stick out more... a lot more. So i plan on 2" backspace out back. Same rim, same tire. Will this be a problem? (not worried about fitment, just driving/cornering/safety).
Ultimately, i plan on having the rears widened 2" to the inside, for a 12" rim and the same 4" backspace. I'll use a bigger tire then (when i buy all 4 new tires). The rim i'm using doesn't come in 12", thus the hassle.
Ultimately, i plan on having the rears widened 2" to the inside, for a 12" rim and the same 4" backspace. I'll use a bigger tire then (when i buy all 4 new tires). The rim i'm using doesn't come in 12", thus the hassle.
Race Director
Joined: May 2006
Posts: 18,662
Likes: 2,563
A 2" backspace on a 10" rim makes no sense to me.
As you increase the width of a wheel you have to increase backspace not decrease it. 5" backspace would seem more likely.
Cannt see a 12" wheel on the back without offset trailing arms.
As you increase the width of a wheel you have to increase backspace not decrease it. 5" backspace would seem more likely.
Cannt see a 12" wheel on the back without offset trailing arms.
Instructor
Joined: Aug 2004
Posts: 204
Likes: 16
From: Holly Springs NC
I believe you are confusing backspacing with offset. 4.5" backspacing will be the same on an 8" wheel or a 12" one, offset on the otherhand is measured from the centerpoint of the wheel and will be much different. But I agree, and feel like a 10" wheel with 2" bs to be silly. OP, wouldnt it make more sense to just invest in the 12" wide wheel that you actually want?
Thread Starter
Burning Brakes
Joined: Oct 2020
Posts: 1,149
Likes: 265
From: The frozen wastes...
Thread Starter
Burning Brakes
Joined: Oct 2020
Posts: 1,149
Likes: 265
From: The frozen wastes...
The 2" BS is temporary, i'll eventually widen the rears to 4". The wheel doesn't exist in 12", it only comes in 8" and 10". If i want wider, i have to modify it.
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Thread Starter
Burning Brakes
Joined: Oct 2020
Posts: 1,149
Likes: 265
From: The frozen wastes...
You laugh... but i know a guy who bought a 'totally stanced-out' car... only to find STACKED 2" hub-adaptors, on each wheel. Yup... one 2" adaptor bolted to another.
Hey, who says putting modern car wheels on old cars has to be expensive? Hahahahahahagrooaaaannn...
Geez... almost as bad as a car i saw for sale in the 90's... had FOUR ov those cheap CAST-aluminum 1/4" spacers between EACH wheel and the drum. Yup... 1 full inch ov **** Chinese aluminum. I wouldn't drive down the street on ONE ov those things...
The **** thats driving around out there man... Be afraid...
Race Director
Joined: May 2006
Posts: 18,662
Likes: 2,563
Temporary has nothing to do with it .
A 2" backspace means the other 8" of a 10" wheel will be crashing through your fenders.
Thread Starter
Burning Brakes
Joined: Oct 2020
Posts: 1,149
Likes: 265
From: The frozen wastes...
Like i have said... a few times now... the 2" backspace will eventually be widened to 4"... by having the 10' rim widened a further 2" to the inside. The end result will be a 15x10 with 4" BS, and a 15x12 with a 4" BS.
I'm just wondering if FOR NOW... i can run a 4" BS up front and a 2" BS out back (same 10" rim width, same 295" tire) without any weirdness going on.
Race Director
Joined: May 2006
Posts: 18,662
Likes: 2,563
Uhhh... i am well aware ov the concept. Not everyone likes nice and tucked tires. I have seen a 12" rim with THREE inches ov backspace, so even more protruding than i have planned. Works very well for him. Obviously... i have flares planned as well...
Like i have said... a few times now... the 2" backspace will eventually be widened to 4"... by having the 10' rim widened a further 2" to the inside. The end result will be a 15x10 with 4" BS, and a 15x12 with a 4" BS.
I'm just wondering if FOR NOW... i can run a 4" BS up front and a 2" BS out back (same 10" rim width, same 295" tire) without any weirdness going on.
Like i have said... a few times now... the 2" backspace will eventually be widened to 4"... by having the 10' rim widened a further 2" to the inside. The end result will be a 15x10 with 4" BS, and a 15x12 with a 4" BS.
I'm just wondering if FOR NOW... i can run a 4" BS up front and a 2" BS out back (same 10" rim width, same 295" tire) without any weirdness going on.
The other thing is where are you going to find a wheel with 2" backspace? Provide a link.
Thread Starter
Burning Brakes
Joined: Oct 2020
Posts: 1,149
Likes: 265
From: The frozen wastes...
take a 8" wheel with 4" backspace, support it on something so it roughly lines up with the wheel studs, move it 2" away from the rotor hub and visually add 2" on the outside to simulate a 10" wheel. That additional 4" will extend beyond the wheel well.
The other thing is where are you going to find a wheel with 2" backspace? Provide a link.
The other thing is where are you going to find a wheel with 2" backspace? Provide a link.
I guess i'll just figure it out the hard way.
Race Director
Joined: May 2006
Posts: 18,662
Likes: 2,563
Le Mans Master
Joined: Mar 2001
Posts: 5,738
Likes: 644
From: Lincoln, CA
You can see a visual between a 8" and 10" wheel with -12MM offset on the front and -89MM offset on the rear.
https://www.willtheyfit.com/index.ph...10&offset2=-89
https://www.willtheyfit.com/index.ph...10&offset2=-89
Melting Slicks
Joined: Dec 2015
Posts: 3,181
Likes: 732
From: Texas City, TX Texas
Should fit no problem, as long as you are sitting high enough to clear the fenders, or have flares. As mentioned, may stress the bearings? They've been racing these cars for 60 years, so I'd think the bearings can take a lot of stress...
Melting Slicks
Joined: Dec 2015
Posts: 3,181
Likes: 732
From: Texas City, TX Texas
You can see a visual between a 8" and 10" wheel with -12MM offset on the front and -89MM offset on the rear.
https://www.willtheyfit.com/index.ph...10&offset2=-89
https://www.willtheyfit.com/index.ph...10&offset2=-89
Team Owner
Joined: May 2001
Posts: 87,302
Likes: 1,583
From: Western NY
OK, I'll bite, since I used to mess with an oval track car.....I, too, used to be able to get different width rims, with custom offsets, no problem. For instance, I was running 15x15 rims, with 2" of backspacing. Now since you want 12" wide rims, and the "stock car company" apparently makes custom width/offset rims, can't they make you the 12" rims that you want? Or, don't they have 12" shells in stock?