Need wheel help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Project77 · 10-23-2011, 02:03 PM

i need help choosing the correct backspacing for the rims i want as much negative backspacing as possible without causing any serious issues
also need help with choosing the correct bolt pattern

J Knight · 10-23-2011, 02:28 PM

On the rear a 5.5in backspace on a 10in wide rim puts the wheel almost dead center. Not sure about the front but I've read that 20x8 with 5.25in backspace is perfect.
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Project77 · 10-23-2011, 02:30 PM

could you teach me about backspacing what it means and what it does because i have no idea what it is talking about

J Knight · 10-23-2011, 02:34 PM

Back space is the distance from the mounting surface of the rim to the outetmost lip of the backside of the rim. Does that make sence?
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Project77 · 10-23-2011, 02:36 PM

yea kind of the more backspacing the deeper the rim?

*78 Chevyrado* · 10-23-2011, 02:41 PM

Here's a Backspacing diagram. the face of the wheel is to the LEFT.

Here's a Wheel Offset Diagram. the face of the wheel is to the RIGHT.

J Knight · 10-23-2011, 02:44 PM

Quote:

Originally Posted by Project77

yea kind of the more backspacing the deeper the rim?

Not exactly. Example; A 10in wide rim with 5.5in of backspace has 5.5in of rim on the backside and 4.5in of rim on the frontside.
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Project77 · 10-23-2011, 02:47 PM

okay from what i see in the diagram the smaller the backspacing the deeper the rim and a negative backspacing is a deeper rim? right?

J Knight · 10-23-2011, 02:51 PM

I'm guessing your truck is 77c10 right? What wheel and tire set up do you want and is it lowered or not?
Posted via Mobile Device

Project77 · 10-23-2011, 02:55 PM

i dont know what the backspacing is on my rims i will go out and check that and no its not lowered but i am going to lower the rear end 2 inches and leave the front stock height just to get it level i currently have 15s but i want to change to 18s

J Knight · 10-23-2011, 03:02 PM

From what I've been hearing 18s are getting hard to find wide enough tires for, but I could be wrong.
Posted via Mobile Device

Project77 · 10-23-2011, 03:05 PM

okay the backspacing on my current rims is 3 1/2 inches and front spacing is 6 inches they are 15s sitting on 31x10.50r15lt standard rim 81/2j what ever all that means

J Knight · 10-23-2011, 03:10 PM

You have 15x10s with 3.5in backspace.
Posted via Mobile Device

Project77 · 10-23-2011, 03:12 PM

my truck

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the rims i want backspacing and all that isnt correct yet just the rim style
http://www.summitracing.com/parts/MBW-61325/

Project77 · 10-23-2011, 03:13 PM

i never thought those rims were 10in wow thats awesome thats alot of rim under that tire haha

10-23-2011, 02:03 PM	#1
Project77 Registered User Join Date: Dec 2010 Location: Hallettsville, Texas Posts: 363	Need wheel help i need help choosing the correct backspacing for the rims i want as much negative backspacing as possible without causing any serious issues also need help with choosing the correct bolt pattern

10-23-2011, 02:28 PM	#2
J Knight Registered User Join Date: Jun 2011 Location: Baytown TX Posts: 2,219	Re: Need wheel help On the rear a 5.5in backspace on a 10in wide rim puts the wheel almost dead center. Not sure about the front but I've read that 20x8 with 5.25in backspace is perfect. Posted via Mobile Device __________________ John 82 Chevy Silverado 350ci/TH350

10-23-2011, 02:30 PM	#3
Project77 Registered User Join Date: Dec 2010 Location: Hallettsville, Texas Posts: 363	Re: Need wheel help could you teach me about backspacing what it means and what it does because i have no idea what it is talking about

10-23-2011, 02:34 PM	#4
J Knight Registered User Join Date: Jun 2011 Location: Baytown TX Posts: 2,219	Re: Need wheel help Back space is the distance from the mounting surface of the rim to the outetmost lip of the backside of the rim. Does that make sence? Posted via Mobile Device __________________ John 82 Chevy Silverado 350ci/TH350

10-23-2011, 02:36 PM	#5
Project77 Registered User Join Date: Dec 2010 Location: Hallettsville, Texas Posts: 363	Re: Need wheel help yea kind of the more backspacing the deeper the rim?

10-23-2011, 02:41 PM	#6
78 Chevyrado Account Suspended Join Date: Dec 2007 Location: Unnapreciative, Trollville Posts: 2,079	Re: Need wheel help Here's a Backspacing diagram. the face of the wheel is to the LEFT. Here's a Wheel Offset Diagram. the face of the wheel is to the RIGHT.

10-23-2011, 02:47 PM	#8
Project77 Registered User Join Date: Dec 2010 Location: Hallettsville, Texas Posts: 363	Re: Need wheel help okay from what i see in the diagram the smaller the backspacing the deeper the rim and a negative backspacing is a deeper rim? right?

10-23-2011, 02:51 PM	#9
J Knight Registered User Join Date: Jun 2011 Location: Baytown TX Posts: 2,219	Re: Need wheel help I'm guessing your truck is 77c10 right? What wheel and tire set up do you want and is it lowered or not? Posted via Mobile Device __________________ John 82 Chevy Silverado 350ci/TH350

10-23-2011, 02:55 PM	#10
Project77 Registered User Join Date: Dec 2010 Location: Hallettsville, Texas Posts: 363	Re: Need wheel help i dont know what the backspacing is on my rims i will go out and check that and no its not lowered but i am going to lower the rear end 2 inches and leave the front stock height just to get it level i currently have 15s but i want to change to 18s

10-23-2011, 03:02 PM	#11
J Knight Registered User Join Date: Jun 2011 Location: Baytown TX Posts: 2,219	Re: Need wheel help From what I've been hearing 18s are getting hard to find wide enough tires for, but I could be wrong. Posted via Mobile Device __________________ John 82 Chevy Silverado 350ci/TH350

10-23-2011, 03:05 PM	#12
Project77 Registered User Join Date: Dec 2010 Location: Hallettsville, Texas Posts: 363	Re: Need wheel help okay the backspacing on my current rims is 3 1/2 inches and front spacing is 6 inches they are 15s sitting on 31x10.50r15lt standard rim 81/2j what ever all that means

10-23-2011, 03:10 PM	#13
J Knight Registered User Join Date: Jun 2011 Location: Baytown TX Posts: 2,219	Re: Need wheel help You have 15x10s with 3.5in backspace. Posted via Mobile Device __________________ John 82 Chevy Silverado 350ci/TH350

10-23-2011, 03:12 PM	#14
Project77 Registered User Join Date: Dec 2010 Location: Hallettsville, Texas Posts: 363	Re: Need wheel help my truck the rims i want backspacing and all that isnt correct yet just the rim style http://www.summitracing.com/parts/MBW-61325/

10-23-2011, 03:13 PM	#15
Project77 Registered User Join Date: Dec 2010 Location: Hallettsville, Texas Posts: 363	Re: Need wheel help i never thought those rims were 10in wow thats awesome thats alot of rim under that tire haha

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