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Wheel Fitment Guide

 
Old 04-02-2006, 02:50 PM
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Hey guys,

Here is the spec of the new wheel that I'm planning to get.
AP1 OEM = 6.5@55 & 7.5@65

18x8Front +48mm w/ 225/40-18

18x9 Rear ++55mm w/ 245/35-18

Do you think it will work out from the OEM spec without rubbing after lowering the car around 1 finger space?

Please advice. Thanks!
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Old 04-02-2006, 04:28 PM
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The front may rub occasionally but the rear should be OK. It somewhat depends on what brand tire you use.
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Old 04-05-2006, 07:23 AM
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What is going on with the scrub radius when these high offests are being used?
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Old 04-05-2006, 09:24 AM
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Originally Posted by abefroeman,Apr 5 2006, 08:23 AM
What is going on with the scrub radius when these high offests are being used?
The factory setup is already high offset, so the car was designed to handling with it. If I understand this correclty, high offset generally lends to a more negative scrub radius and for the front end, this is not a real severe problem. Getting rims with low +offset is the main problem with finding rims for this car. This is when steering can be altered due to a more positive scrub radius. For the rears on a RWD car like ours, the affects are only slightly pronounced for increasing the scrub radius. And since finding high offset rims is NOT a common thing, scrub radius in not a factor. It's only a factor when dealing with low offset rims where the scrub radius is reduced.

I think your question should have read, "What is going on with the scrub radius when these LOW offsets are being used?"
(Or am I off my rocker? )
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Old 04-06-2006, 06:27 AM
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okay guys I have a question would a 18x9 50 offset fit and s2000. ?
and if so what tire size would I have to go with.
reading over the listed fitments it doesnt look like they will fit... anyone know >?
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Old 04-06-2006, 06:29 AM
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damn come to think about it... both the front and rear are +50 offset.
18x8 fronts and 18x9 rears.... I guess they wont work...
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Old 04-06-2006, 08:46 AM
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The good Lord helps those who help themselves.
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Old 04-06-2006, 09:28 AM
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Originally Posted by spa-zz,Mar 20 2006, 02:35 PM
Not sure if anyone knows the maximum offsets that can be used. There are so few wheels with offsets high enough, much less too high.

The chart already lists the minimum offsets. The problem is that people don't read the Guide, even though it's there.

Not everyone has Excel, so that's not the best way to do it.

I'm in the process of re-writing the Guide, to be easier to read and use. I'll be posting it soon. It will be based on offset and tire width, because that's what really matters. Wheel width is secondary, and just needs to be chosen to fit a given tire. Also it's written in a FAQ format, with a Table of Contents, so people can quickly find their answers.

Cheers,
Spa-zz
caveat: A narrower wheel w/ same offset and tire size will give you more fender clearance. (Your table will need to be 3 dimensional if you want to capture this)
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Old 04-06-2006, 10:22 AM
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The effect of differing wheel width on our situation is so minor, we ignore it. It's generally the tread at the widest point that rubs, not the side wall. Because of this, wheel width has nearly zero effect. (Less than other factors such as alignment, ride height, etc, and we already ignore those for simplicity.)

Don't forget, offset is measured from center. So the change in wheel width does not move the tread surface of the tire in or out.

Cheers,
Spa-zz
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Old 04-06-2006, 11:53 AM
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... thanks for the lesson dude
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