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Chevy backspace question
#746835 March 31st 2019 9:49 pm
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Hey I can’t find the answer to this question anywhere!

So I’m going to run 215/60/15 fronts and 275/60/15 rears on 15x8 and 15x10 cragars. What offset am I looking for? Yes I want the rears to stick out past the body, don’t worry I’ve got an extender arm for the slider! Lol.

Re: Chevy backspace question
DaveyRiot #746861 April 01st 2019 5:39 pm
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I have 3.5" backspace on my Dodge rear 10" cragar sticks out nicely. My astro has 10" slots and yes the slider does not function..lol I wonder if anyone makes an extended for it?


When in doubt..get the sawzall out..
Re: Chevy backspace question
DaveyRiot #746997 April 05th 2019 12:14 am
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This question has been asked ad nauseam here and countless other places, yet nobody will ever know the answer.

I suppose it's one of life's greatest mysteries.


[Linked Image from i.imgur.com]
Re: Chevy backspace question
DaveyRiot #747001 April 05th 2019 1:45 am
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they ask the question but dont say how much they want it to stick out ... do they have flairs ....

There so many questions to be answered but all they want is a number.

The smaller the back space the further the tire sticks out ..... the larger back space the tighter the tire sits to the veh.

Everybody is different on what they want it to look like with different tires .. some look good stickin way out some dont.


https://www.customwheeloffset.com/tire-wheel-backspacing-offset-calculators


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: Chevy backspace question
DaveyRiot #747015 April 05th 2019 8:12 am
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I did a ton of research and measuring when I bought wheels for my 1985 G20. I wanted Cragars, but ended up going with Torque-Thrust 2s because they were one of the only wheel designs that came in my ideal calculated sizes for both front and rear.

Here is what the specs are and what it looks like:

Keep in mind:
-I have flairs
-I have drop knuckles in the front that also widened the track about 0.5".

Front: 15x8 with 3.75" backspace / 255/60/15 tire
Rear: 15x10 with 3.77" backspace / 295/50/15 tire


[Linked Image]

Last edited by tuner4life; April 05th 2019 8:15 am.

[Linked Image]
Re: Chevy backspace question
DaveyRiot #747018 April 05th 2019 10:02 am
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Well, if he's buying new 15x10 Cragars he's limited to 4.25" backspacing and -32mm offset because that's all they currently make.

That wheel paired with 275/60 tires will look big & meaty, and stick out past the stock wheel well quite a bit.

There, that was easy!


[Linked Image from i.imgur.com]
Re: Chevy backspace question
DaveyRiot #747026 April 05th 2019 1:01 pm
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All out of context quotes not necessarily in order attributed to the fine Vanners above. Good Day Gentlemen.

"I did a ton of research and measuring. Yes I want to stick out. I’ve got an extender, don’t worry. Everybody is different on what they want it to look like, some look good stickin' way out some don't. I wonder if anyone makes an extended for it? That will look big & meaty, and stick out, quite a bit. They ask the question but don't say how much they want it to stick out

This question has been asked ad nauseam here and countless other places, yet nobody will ever know the answer."
Proving, once again,
"I suppose it's one of life's greatest mysteries."

"There, that was easy!"

Re: Chevy backspace question
tuner4life #748271 May 11th 2019 3:28 am
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How'd those 255's fit on the 15x8?

Re: Chevy backspace question
DaveyRiot #748325 May 13th 2019 8:50 am
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Not sure who that was directed at, but 255/60's fit just fine on 15x8.


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