new wheels help needed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

79gmcclassic · 04-25-2016, 01:34 PM

long time no post, looking at getting new wheels. I am definitely going staggered, I want to have 15x8 up front and 15x10 out back. I want to go with US mags U101 indy slots. The problem I have is the 15x10s have a 3.75 inch backspace and -50 offset. And according to the research i have done, 3.75 inch backspace wont work unless i modify my inner rear wheel tubs. Which I do not want to do. Any advice would be appreciated! Thanks!

http://us-mags.com/indy-u101-truck-w-5493.htm

**lolife99** · 04-25-2016, 02:32 PM

I think you are confused.
A 10" wide wheel with a 3.75" bs will be close to the BEDSIDE not the inner wheel tub.
A 15x8 rally wheel has a 4" bs and there is tons of room between the wheel and the wheel tub.

79gmcclassic · 04-25-2016, 02:44 PM

Quote:

Originally Posted by lolife99

I think you are confused.
A 10" wide wheel with a 3.75" bs will be close to the BEDSIDE not the inner wheel tub.
A 15x8 rally wheel has a 4" bs and there is tons of room between the wheel and the wheel tub.

Ahhhh yes that is a good point! makes more sense now, looks like i wont be able to run a 15x10 in that wheel after all.

**lolife99** · 04-25-2016, 02:50 PM

Quote:

Originally Posted by 79gmcclassic

Ahhhh yes that is a good point! makes more sense now, looks like i wont be able to run a 15x10 in that wheel after all.

Did you measure your truck to confirm that?

geezer#99 · 04-25-2016, 07:53 PM

Check this on how to fit your wheels.
http://www.hotrod.com/how-to/wheels-...heels-fitment/

Malo83 · 04-26-2016, 02:29 AM

15x8 for the front 4" BS
15x10 on the rear 5" BS
This will tuck and prevent rubbing

79gmcclassic · 04-26-2016, 03:19 PM

Quote:

Originally Posted by Malo83

15x8 for the front 4" BS
15x10 on the rear 5" BS
This will tuck and prevent rubbing

is your truck an example? if so could you show pics please!

Malo83 · 04-26-2016, 03:40 PM

I have a couple here

http://67-72chevytrucks.com/vboard/s...d.php?t=621042

C10Samano · 04-30-2018, 08:05 PM

Does anyone know of 20x10 with 4.5 backspace and -25 offset will fit on stock rearend

04-25-2016, 01:34 PM	#1
79gmcclassic Registered User Join Date: Jun 2010 Location: Green bay, Wisconsin Posts: 593	new wheels help needed long time no post, looking at getting new wheels. I am definitely going staggered, I want to have 15x8 up front and 15x10 out back. I want to go with US mags U101 indy slots. The problem I have is the 15x10s have a 3.75 inch backspace and -50 offset. And according to the research i have done, 3.75 inch backspace wont work unless i modify my inner rear wheel tubs. Which I do not want to do. Any advice would be appreciated! Thanks! http://us-mags.com/indy-u101-truck-w-5493.htm __________________ 1979 GMC Sierra Classic Freshly lowered 5 inches

04-25-2016, 02:32 PM	#2
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,701	Re: new wheels help needed I think you are confused. A 10" wide wheel with a 3.75" bs will be close to the BEDSIDE not the inner wheel tub. A 15x8 rally wheel has a 4" bs and there is tons of room between the wheel and the wheel tub. __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

04-25-2016, 07:53 PM	#5
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,749	Re: new wheels help needed Check this on how to fit your wheels. http://www.hotrod.com/how-to/wheels-...heels-fitment/

04-26-2016, 02:29 AM	#6
Malo83 Cruzzzn' Vet Join Date: Jan 2005 Location: Porterville,Ca. Posts: 1,918	Re: new wheels help needed 15x8 for the front 4" BS 15x10 on the rear 5" BS This will tuck and prevent rubbing

04-26-2016, 03:40 PM	#8
Malo83 Cruzzzn' Vet Join Date: Jan 2005 Location: Porterville,Ca. Posts: 1,918	Re: new wheels help needed I have a couple here http://67-72chevytrucks.com/vboard/s...d.php?t=621042

04-30-2018, 08:05 PM	#9
C10Samano Registered User Join Date: Feb 2017 Location: Bakersfield, California Posts: 8	Re: new wheels help needed Does anyone know of 20x10 with 4.5 backspace and -25 offset will fit on stock rearend



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