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Rim gurus.. have a offset question.

Say I have 31mm spacers all around, what offset would I have to run to keep the rims close to stock location?

Thanks
Jason

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Old 12-27-2006, 01:46 PM
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I am no expert but i think you would need to run somewhere around a 20mm offset for it to fit your narrow body fenders correctly. For example the 924S use early offset suspension with late offset wheels to fit the fenders correctly.

Your 931 is the same case, however with the spacers i think you can get away with running generic early offset wheels (23.3mm) and it should look fine.

If you take the spacers off, i think you can run any late offset wheel (52.3mm)..however i am not sure if your car is 5-lug or not.
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Old 12-27-2006, 03:59 PM
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Yeah, my car is 5 bolt, so its late offset 52.3mm..

I forgot to mention in the first post, I wanna run 17x7 rims..

I'm looking at the bolt pattern adapters to run some different rims. The adapter is 31mm wide. I wanna run 17x7 all around. So even with 7 inch wide rims I should look for 20mm offsets?

I'm looking for something like these...

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Old 12-27-2006, 04:17 PM
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I think as long as you dont go over 9 inches wide it wont be noticeable.

Ideally you want to run a 7-inch rim with a 23.3mm offset. That would set the look the same way the factory had it. You can go higher or lower with the offset depending what you find. You just have to take into account how far in or far out the rim is going to sit. For example a 22.3mm offset will stick roughly 1mm farther out than what the 'factory' look is.

The big problem you may have is finding a correct bolt pattern adapter. Porsche uses kind of an oddball size. I do remember there was a company on eBay i think that made a adapter to run more generic bolt patterns (for stuff like Japanese wheels). However thats an awful lot of weight you are strapping onto the hub, running a spacer / bolt pattern adapter.
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Last edited by Techno Duck; 12-27-2006 at 04:30 PM..
Old 12-27-2006, 04:25 PM
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Quote:
Originally posted by flosho
I'm looking for something like these...

Are they made in Porsche's 5x130 bolt pattern?

Since Porsche is the only manufacturer that uses that bolt pattern, it would only make sense for the wheel manufacturer to use the right offset, otherwise, they are marketing a wheel that nobody can use.

Nice looking wheels, but they must be the Porsche specific bolt pattern to work.
Old 12-27-2006, 04:27 PM
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Quote:
Originally posted by Techno Duck
I think as long as you dont go over 9 inches wide it wont be noticeable.

Ideally you want to run a 7-inch rim with a 23.3mm offset. That would set the look the same way the factory had it. You can go higher or lower with the offset depending what you find. You just have to take into account how far in or far out the rim is going to sit. For example a 22.3mm offset will stick roughly 1mm farther out than what the 'factory' look is.

The big problem you may have is finding a correct bolt pattern adapter. Porsche uses kind of an oddball size. I do remember there was a company on eBay i think that made a adapter to run more generic bolt patterns (for stuff like Japanese wheels). However thats an awful lot of weight you are strapping onto the hub, running a spacer / bolt pattern adapter.

You think 7 inch wide rim with ~35mm offset is going to sit in too far? Its really only a centimeter or so though. I'm not going to be pounding on the car with these rims, I'll go with 15/16" PD for autox.



Quote:
Originally posted by Dantilla
Are they made in Porsche's 5x130 bolt pattern?

Since Porsche is the only manufacturer that uses that bolt pattern, it would only make sense for the wheel manufacturer to use the right offset, otherwise, they are marketing a wheel that nobody can use.

Nice looking wheels, but they must be the Porsche specific bolt pattern to work.

No they aren't made in 5x130.. I'll be running the adapters that are sold on ebay to change it over to 5x114.3 which has more popular sizes.. mustangs/240sx etc..
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Old 12-27-2006, 04:35 PM
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Old 12-28-2006, 04:11 PM
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Whoa - wait - stop.

Spacers take away from offset. Think about it. Which sticks out further - a 23mm offset wheel or a 52mm offset wheel? A: The 23mm offset wheel. How do you make a 52mm fit like a 23mm wheel? Add a spacer. So if you have a 31mm spacer/adapter you need 31mm more offset than a standard wheel. Stock wheels are 6" wide, 52mm offset. You're going to need around 80mm of offset to have wheels that fit properly, maybe a little less, but not much.
Old 12-28-2006, 04:38 PM
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http://www.1010tires.com/WheelOffsetCalculator.asp

use this

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Old 12-28-2006, 09:03 PM
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