backspacing help on rear - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ryanw · 01-30-2011, 10:32 AM

I want to go with 15x10s on the rear of a 69, what is the best backspace to go with so they dont rub anywhere when the truck is dropped on the air bags. Id really appreciate any input!

ryanw · 01-30-2011, 06:29 PM

Any ideas, I know lots have 10s on the back. Im just worried about clearance when they are tucked in the wheel wells. normal ride hight gives them more room.

thowry · 01-30-2011, 06:42 PM

4.5 has been good 4 me look at my profile thats wat i have mine r 9.5 wide

**lolife99** · 01-30-2011, 09:17 PM

There are too many varibles.
You need to do the drop.
Center the rearend with an adjustable track bar.
Then measure.

Do you still have the original "narrow" 6-lug '69 rearend?
Or the "wider" 71-72 (and mid '70) rearend?

ryanw · 01-30-2011, 10:45 PM

Thanks for the input. very true,
it has the 5 lug/ wider rear with adjustable bar

Im looking to get an idea and have a place to start.

01-30-2011, 10:32 AM	#1
ryanw Registered User Join Date: Oct 2010 Location: PA Posts: 14	backspacing help on rear I want to go with 15x10s on the rear of a 69, what is the best backspace to go with so they dont rub anywhere when the truck is dropped on the air bags. Id really appreciate any input!

01-30-2011, 06:29 PM	#2
ryanw Registered User Join Date: Oct 2010 Location: PA Posts: 14	Re: backspacing help on rear Any ideas, I know lots have 10s on the back. Im just worried about clearance when they are tucked in the wheel wells. normal ride hight gives them more room.

01-30-2011, 06:42 PM	#3
thowry Registered User Join Date: Jan 2011 Location: Clinton,IL Posts: 8	Re: backspacing help on rear 4.5 has been good 4 me look at my profile thats wat i have mine r 9.5 wide

01-30-2011, 09:17 PM	#4
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,703	Re: backspacing help on rear There are too many varibles. You need to do the drop. Center the rearend with an adjustable track bar. Then measure. Do you still have the original "narrow" 6-lug '69 rearend? Or the "wider" 71-72 (and mid '70) rearend? __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 01-30-2011 at 09:18 PM.

01-30-2011, 10:45 PM	#5
ryanw Registered User Join Date: Oct 2010 Location: PA Posts: 14	Re: backspacing help on rear Thanks for the input. very true, it has the 5 lug/ wider rear with adjustable bar Im looking to get an idea and have a place to start.



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