Help me on this rim measurement

[LovinPSDs]

I found some rims I'm interested in... they are 12.5" wide and have 8" of backspacing... so let me know if this seems right and can I run these on an 08"????

12.5" wheel, 8" BS means 4.5" of offset correct?

What worries me is the 8" of backspacing, will these work/clear on an 08' setup?

 

[Betarocker]

That is an odd wheel.

A 'normal' after market 12" rim for 05+ SD has a 5.5" BS = to -25mm (-1") Offset
Those measurements results in a +31.5mm (1.25") Offset.

There are a number of sites that explain the differences and correlation of Offset to Backspace.

 

[Betarocker]

http://www.rimsntires.com/specs.jsp...5&ar2=60&bd2=20&rw2=12.5&et2=32&text1=&text2=

 

[jwlandry]

you sure the 8 isnt the rim width?

 

[LovinPSDs]

you sure the 8 isnt the rim width?

They are 12.5 wide.. I have a picture with a tape up to them. The guy measured from the bolt holes flush to the inside lip of the rim at 8"

 

[LovinPSDs]

Betarocker,

Thanks for that web page. If my understanding is correct then this wheel will not stick out very far from the truck??

I'm looking for something that will stick out far as i can. Been tough considering there aren't many 16.5 x fairly wide rims in a 8x170 BP what will stick out.

 

[Jeff@Spartan]

Less back space and negative offset is going to stick out more.

If you want it sticking out a lot, get something with 4.5-5" back spacing.

 

[DC@Special]

Yep, what he said.....if you want it to stick out further get a 12-14" wide wheel with 4.5" Back Space.

 

[LovinPSDs]

Bump, so is 4.5" of backspacing enough to clear the rotors with a 16.5'' or 17" rim? I really want a 16.5 because it gives me alot more options for tire size (boggers)

 

[MINK]

a 17 yes a 16.5 idk if that will even clear...