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Official 6-Lug Re-drill Thread: Now in the USRM!


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264 replies to this topic

#101 TheLoyale

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Posted 12 April 2012 - 06:57 PM

when you say 13", is that size of the wheel, or is that the distance from the center hole to the inner lip of the wheel?


13" diameter wheel (Stock size)

13" wide wheels! OMG.... That would be nuts on a Subaru haha.

#102 wilcox

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Posted 12 April 2012 - 07:03 PM

ok so i understand what back spacing is, but what is offset? and what do you have to look for when picking out a set of wheels to make sure that they wont interfere with brake components?


so what im asking is what do i look for to make sure that the surface the lugz go through or the spokes dont rub on the caliper's. ive seen it happen in other custom situations

#103 TheLoyale

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Posted 12 April 2012 - 07:10 PM

Ah, I get what your asking. I don't really have an answer for that. I guess if I were looking at wheels, I'd look at the lug seat/surface and how the spoke would interfere if at all.

Somebody else will chime in.

#104 wentz912

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Posted 12 April 2012 - 07:28 PM

IMO Offset is another word for Backspacing. (At least thats what I go by) As long as you go bigger then 13", nothing will interfere with the brake system, Calipers, Rotors and or Drums will all clear.

Width will be the only issue, may hit the Spring perch or Strut body, Possible rubbing on Tierod end. But you can run a pretty wide tire on these.


Incorrect. Offset is the distance from the centerline of the rim of the wheel, to the wheel mounting surface(The surface up against the wheel hub/brake drum when it's mounted.) It's negative when it's closer to the outside lip, and positive when it's closer to the inside.

EXAMPLE:
My 14x6 Pug alloys have 4.5" of backspace. The centerline of the 6" wheel is 3" across. 3"-4.5"= -1.5" This implies that they also have 1.5" of negative offset.

The "real" formula for calculating offset is as follows:

(Wheel width/2)-(Backspace)=Offset

#105 obk25xt

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Posted 12 April 2012 - 07:39 PM

Incorrect. Offset is the distance from the centerline of the rim of the wheel, to the wheel mounting surface(The surface up against the wheel hub/brake drum when it's mounted.) It's negative when it's closer to the outside lip, and positive when it's closer to the inside.

EXAMPLE:
My 14x6 Pug alloys have 4.5" of backspace. The centerline of the 6" wheel is 3" across. 3"-4.5"= -1.5" This implies that they also have 1.5" of negative offset.

The "real" formula for calculating offset is as follows:

(Wheel width/2)-(Backspace)=Offset


Nice work buddy....

You're such a sexual intellectual.....
(effinknowitall) :-p

#106 wentz912

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Posted 12 April 2012 - 07:44 PM

Nice work buddy....

You're such a sexual intellectual.....
(effinknowitall) :-p


Don't hate man. when you going to let me come down and help you work on the beast huh? Plus i gotta give you a list of parts to dig out of the barn!

#107 wilcox

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Posted 12 April 2012 - 08:03 PM

hey "wentz912" thanks for the information, me and mr. loyal leared something there. so then what is back spacing?

#108 wentz912

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Posted 12 April 2012 - 08:34 PM

hey "wentz912" thanks for the information, me and mr. loyal leared something there. so then what is back spacing?



Backspace is still just the amount of SPACE from the BACK lip of the wheel to the wheel mounting surface.

#109 wilcox

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Posted 12 April 2012 - 08:58 PM

so effectivly is back spacing really just offset + other half of the rim. i get it i just dont understand why they need both measurements

#110 heartless

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Posted 12 April 2012 - 09:29 PM

so effectivly is back spacing really just offset + other half of the rim. i get it i just dont understand why they need both measurements



Maybe this will clear it up for you...

http://www.streetdreams.org/tech.php

#111 TheLoyale

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Posted 12 April 2012 - 09:51 PM

Ah, I understand that now. Finally got that cleared up after 2yrs!

Good posts, thank you.

#112 wentz912

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Posted 12 April 2012 - 10:07 PM

so effectivly is back spacing really just offset + other half of the rim. i get it i just dont understand why they need both measurements


Yup pretty much. You can get the other number, no matter which one you have. I usually see backspace always measured in inches though, while offset can be either inches or mm.

#113 wilcox

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Posted 12 April 2012 - 10:11 PM

so then what determines how wide of a wheel you need

#114 wentz912

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Posted 12 April 2012 - 10:22 PM

Going to be a wheeler or a DD/ocassional wheeler?

#115 wilcox

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Posted 12 April 2012 - 10:25 PM

idk probably like a weekend/hunting wheeler. so does the size of the tire have anything to do with the with the width of the rim?

#116 wentz912

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Posted 12 April 2012 - 10:45 PM

Yes, you never want the tire size to be narrower than the wheel width. the closer to the wheel width that your tire is, the less "bubble" the tire will have.

#117 wilcox

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Posted 12 April 2012 - 11:37 PM

so if i put a skinny tire on a wide wheel it wont fit, and if i put a wide tire on a skinny wheel it will bubble.

#118 TheLoyale

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Posted 13 April 2012 - 12:17 AM

so if i put a skinny tire on a wide wheel it wont fit, and if i put a wide tire on a skinny wheel it will bubble.


If you put a skinny tire on a wider wheel, it willl bow or pull out the sides, a tire shop will not mount a tire that is to much narrower then the rim, as it is a lot of stress on the bead.

You can mount a wider tire on a less wide rim, it will protect the bead lip more if offroading (I see this all the time on offroaders)

#119 TheLoyale

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Posted 13 April 2012 - 12:26 AM

As you can see here, the wheel bead is sunken into the tire more, so there is more rubber sidewall to protect the rim from rocks ect.

Posted Image

Also like this, the wheel is a 15x7 but it is a 10.5" wide tire. You can also run a 12" wide on the same 15x7 wheel.

Posted Image

Posted Image

#120 987687

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Posted 13 April 2012 - 06:57 AM

It's also a royal pain in the butt trying to mount a tire that's considerably thinner than the rim.
After dealing with that a few times while working at a garage, I started refusing to do it.
It was a lot of VW crowd wanting sidewall stretch... sigh...

#121 TheLoyale

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Posted 13 April 2012 - 09:08 AM

Eww, why? I like a tire with nice sharp square lines. Stretched sideways give me the hebbie jebbies..

#122 987687

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Posted 13 April 2012 - 09:23 AM

Eww, why? I like a tire with nice sharp square lines. Stretched sideways give me the hebbie jebbies..


Because STANCE :banghead:

I don't get it... merely relating what I've dealt with working at a shop.

#123 O.C.D.

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Posted 13 April 2012 - 10:13 AM

VW=Stretched tires and Hellaflush. Just the culture.

#124 TheLoyale

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Posted 13 April 2012 - 11:14 AM

VW=Stretched tires and Hellaflush. Just the culture.


I could think of a few better things to do with a VW :brow:

#125 987687

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Posted 13 April 2012 - 11:34 AM

I could think of a few better things to do with a VW :brow:


They're good for rallyx, and with good suspension and tires they handle pretty nice. Same goes for hondas and all the other ricer mobiles.




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