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Chevy backspace question #746835
March 31st 2019 9:49 pm
March 31st 2019 9:49 pm
Joined: Feb 2016
Posts: 14
Toronto Ontario Canada
DaveyRiot Offline OP
stranger
DaveyRiot  Offline OP
stranger
Joined: Feb 2016
Posts: 14
Toronto Ontario Canada
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 [Re: DaveyRiot] #746861
April 01st 2019 5:39 pm
April 01st 2019 5:39 pm
Joined: May 2018
Posts: 434
TN
Astrocreep66 Offline
addict
Astrocreep66  Offline
addict
Joined: May 2018
Posts: 434
TN
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 [Re: DaveyRiot] #746997
April 05th 2019 12:14 am
April 05th 2019 12:14 am
Joined: Dec 2017
Posts: 238
Portland, OR
Scrojira Offline
enthusiast
Scrojira  Offline
enthusiast
Joined: Dec 2017
Posts: 238
Portland, OR
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.

Re: Chevy backspace question [Re: DaveyRiot] #747001
April 05th 2019 1:45 am
April 05th 2019 1:45 am
Joined: Jun 2010
Posts: 14,440
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 14,440
Van Diego California
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 [Re: DaveyRiot] #747015
April 05th 2019 8:12 am
April 05th 2019 8:12 am
Joined: Sep 2013
Posts: 881
Indiana
tuner4life Offline
old hand
tuner4life  Offline
old hand
Joined: Sep 2013
Posts: 881
Indiana
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 [Re: DaveyRiot] #747018
April 05th 2019 10:02 am
April 05th 2019 10:02 am
Joined: Dec 2017
Posts: 238
Portland, OR
Scrojira Offline
enthusiast
Scrojira  Offline
enthusiast
Joined: Dec 2017
Posts: 238
Portland, OR
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!

Re: Chevy backspace question [Re: DaveyRiot] #747026
April 05th 2019 1:01 pm
April 05th 2019 1:01 pm
Joined: Nov 2013
Posts: 1,206
West Texas
W
Wedgy Offline
old hand
Wedgy  Offline
old hand
W
Joined: Nov 2013
Posts: 1,206
West Texas
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 [Re: tuner4life] #748271
May 11th 2019 3:28 am
May 11th 2019 3:28 am
Joined: Feb 2016
Posts: 14
Toronto Ontario Canada
DaveyRiot Offline OP
stranger
DaveyRiot  Offline OP
stranger
Joined: Feb 2016
Posts: 14
Toronto Ontario Canada
How'd those 255's fit on the 15x8?

Re: Chevy backspace question [Re: DaveyRiot] #748325
May 13th 2019 8:50 am
May 13th 2019 8:50 am
Joined: Sep 2013
Posts: 881
Indiana
tuner4life Offline
old hand
tuner4life  Offline
old hand
Joined: Sep 2013
Posts: 881
Indiana
Not sure who that was directed at, but 255/60's fit just fine on 15x8.


[Linked Image]
Re: Chevy backspace question [Re: tuner4life] #748735
May 22nd 2019 11:37 am
May 22nd 2019 11:37 am
Joined: May 2019
Posts: 1
Swift Current
N
Nefarius Offline
stranger
Nefarius  Offline
stranger
N
Joined: May 2019
Posts: 1
Swift Current
Where did you get the drop spindles?


1984 Chevy G20

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