15 x 12 wheel backspacing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jj72c10 · 09-02-2010, 10:48 AM

I am in the process of building a '72C10 shortbox. I just had the floor cut and wheel tubs widened and have purchased a pair of 29x15x15 MT street radials. The rear end is the original and has not been shortened. What is the proper backspace needed for 15 x 12 rims to fit inside the boxsides?

Thanks,

Jeff

OARNGESI · 09-02-2010, 11:57 AM

7.5 should work nicely

Hottrucks · 09-02-2010, 01:39 PM

check my build I added 4" to a stock ralley all in back space and things fit very well same size tires too

09-02-2010, 10:48 AM	#1
jj72c10 Registered User Join Date: Dec 2008 Location: Cedar Rapids, IA Posts: 24	15 x 12 wheel backspacing I am in the process of building a '72C10 shortbox. I just had the floor cut and wheel tubs widened and have purchased a pair of 29x15x15 MT street radials. The rear end is the original and has not been shortened. What is the proper backspace needed for 15 x 12 rims to fit inside the boxsides? Thanks, Jeff

09-02-2010, 11:57 AM	#2
OARNGESI Registered User Join Date: Sep 2008 Location: CASA GRANDE AZ Posts: 4,276	Re: 15 x 12 wheel backspacing 7.5 should work nicely __________________ 70 SWB STEPSIDE 70 BLAZER 09 challenger

09-02-2010, 01:39 PM	#3
Hottrucks Redefining LowBudget Join Date: Mar 2009 Location: lebanon Cow Hampshire Posts: 4,538	Re: 15 x 12 wheel backspacing check my build I added 4" to a stock ralley all in back space and things fit very well same size tires too



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