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Old August 3rd, 2016, 04:54 PM   #1
ID I
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Default Need help with rear wheel offset

Since I got my 69 in the body shop getting chopped and having a torsion housing raise I need to start thinking about how I'm going to fit 31-32 in. tires in the rear.

The pan is a 69 IRS. I want to run disk brakes.

The disk brakes can get me 1". Honestly, I'm not sure how much wheel I can have hanging on the stub axles before it becomes a detriment. This impacts the type of rim. I know some builds have used a single dually tire. Not sure how that holds up over time. I know I can custom order rims but would rather try to repurpose some.

Here is a mock up with a reversed FJ Cruiser rim (31.5" overall size).



Here is a build that I'm basing mine off of. Best I have been able to find out is that he used an 18" truck rim. Looks like a dually to me.



An option I have been kicking around is running wider trailing arms. I have only seen ones that extend the length and width not just the width alone. I can also just run wheel spacers but I know there is a certain point that there is just too much wheel hanging off.

If I recall right I need to make up 4" but without my bug handy to measure I'm not sure exactly how much I need to clear the body.

Any ideas or experience with this issue is greatly appreciated.
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Old August 3rd, 2016, 05:40 PM   #2
tattooed_pariah
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Default Re: Need help with rear wheel offset

If I'm not mistaken, some of the past solutions have been to reshape the rear fender wells so they don't interfere, or to use backset rims..

not positive though.

(I know I wasn't much help, but I hate seeing my own threads be read and no one responding..)
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Old August 3rd, 2016, 06:35 PM   #3
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86/up 944 turbo aluminum arms will bolt up if you change the inner bushing to vw. 2.5" wider per side, disc brakes, but you're stuck with 5x130 bolt pattern.

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Old August 4th, 2016, 06:56 AM   #4
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Default Re: Need help with rear wheel offset

I just went through the same thing and ended up getting some 3x3s and will measure for wheel spacers to make up the rest once I install the trailing arms. My wheels have a pretty low offset but nothing crazy. When I was shopping around, I found a guy named Mark at Blind Chicken Racing that would custom make trailing arms with added width and no added length for $650..
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Old August 4th, 2016, 11:35 AM   #5
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I think the rims on that green Bug are spares. About the cheapest way to get steel 18s.

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Old August 5th, 2016, 09:43 AM   #6
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Default Re: Need help with rear wheel offset

The Section 8 build used spares from a crystler 300 up front and the rear was only mentioned as an 18" truck rim. The website that hosted the most info on his build is no more. He hasn't been active on thesamba for about a year or so. The car ended up being sold and the buyer switched out the rims for something a little more street. I was wondering if the truck tires on the rear was too much.

Im trying to keep the body mods to min since I have a shop doing the body work.

@breakfastbacon
Do you have pics of the wheel placement for the 3x3? I don't mind adding extra width but I am unsure of the looks for extra length.

@uglydog56
Thanks for reminding me about the Porsche arms. Been researching this project for about 2 years and losing my bookmarks for sites hasn't helped.

@tattooed_pariah
Thanks for the response.

@cretin
Yeah the spare tire aspect is something I have been planning on.
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Old August 6th, 2016, 12:41 PM   #7
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I considered the spares, and also the "transport rims." But they're just too common for my taste. Not like you see Volksrods every day on the street, but I gotta be original.

So I went with the Rocket Fire in 16 and 18. Tires were a bitch to find, though. Yokohama is the only good brand that mades the needed sizes

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Old August 6th, 2016, 01:36 PM   #8
ID I
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Default Re: Need help with rear wheel offset

Nice rims. What size tires you end up going with?

I spent all day going through rims and playing with calculators. I got a good feel of what to look for when I go for a good set. Still not sure what to do for arms. Going to stop by the shop and get some better measurements and see what's more cost effective for me.
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Old August 6th, 2016, 06:32 PM   #9
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185/55R16 front (24" tall)
215/55R18 rear (27" tall)

These are really close to the 125SR15 and 215/75R15 that were on it before, but the fronts are obviously a bit wider.

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Old August 6th, 2016, 11:20 PM   #10
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Default Re: Need help with rear wheel offset

Quote:
Originally Posted by breakfastbacon View Post
custom make trailing arms with added width and no added length for $650..
I assume it would still need custom length axles?
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Old August 8th, 2016, 06:30 AM   #11
ID I
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Default Re: Need help with rear wheel offset

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Originally Posted by rostigbug View Post
I assume it would still need custom length axles?
Not necessarily. The wider x longer arms after a certain size use bus axles iirc. They are easy to obtain and venders that sell the arms generally have the right axles. Now if I were to just go wider more than the 2.5 inches I can get from a Porsche arm I might need custom axles. I need to talk with my body shop guy and do some measuring to see what's cost effective to give me the look I want.
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Old August 8th, 2016, 08:14 AM   #12
breakfastbacon
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Default Re: Need help with rear wheel offset

I haven't gotten them mounted up yet but ill be sure to post some pictures when i do.

Here's what blind chicken racing says about axle lengths.
http://www.blindchickenracing.com/pr...sion_parts.htm
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Old August 17th, 2016, 02:11 PM   #13
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Default Re: Need help with rear wheel offset

I was going to suggest 2x3 arms from blind chicken racing. 2" wider, 3" longer. Have a set in my shop and they are beefy as hell!
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