The ST185 wheel size thread (offsets, widths, etc)

Suspension and other discussion

Postby lumbercis » Tue May 01, 2007 4:47 am

Okay, I did a little more research and managed to confuse myself.

Point of confusion 1: On the very first post of this thread it says that 17x9 +30 we "know" fits, which is presumably why TD chose those specs. Now they don't fit anymore? Why? Is it particular to the design of the TD wheels? I know several people were using the Sportmax 050's with those specs and didnt report any major problems?

Point of confusion 2: Just regarding appearance, i found several posts that stated that 17x9 +30 was "flush" up front. But Superwhite92 just suggested a +20. If the +30 is flush wouldnt the +20 stick out past the fender?

Point of confusion 3: A few pages back, someone posted these specs for 17x9s that are flush front and rear with no spacers: Front: 17x9, +25ET, Rear: 17x9, +13ET. Ive heard as low as +5 in the rear. Why the discrepancy? Without spacers, what offset F/R allows both wheels to be flush with the fenders? Why does this seem to be a matter of opinion? Can't you just measure and figure it out?

I'm starting to think figuring our wheel offsets is a form of black magic.

:x
J.
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Postby SuperWhite92 » Tue May 01, 2007 5:33 am

lumbercis wrote:Okay, I did a little more research and managed to confuse myself.

Point of confusion 1: On the very first post of this thread it says that 17x9 +30 we "know" fits, which is presumably why TD chose those specs. Now they don't fit anymore? Why? Is it particular to the design of the TD wheels? I know several people were using the Sportmax 050's with those specs and didnt report any major problems?

Point of confusion 2: Just regarding appearance, i found several posts that stated that 17x9 +30 was "flush" up front. But Superwhite92 just suggested a +20. If the +30 is flush wouldnt the +20 stick out past the fender?

Point of confusion 3: A few pages back, someone posted these specs for 17x9s that are flush front and rear with no spacers: Front: 17x9, +25ET, Rear: 17x9, +13ET. Ive heard as low as +5 in the rear. Why the discrepancy? Without spacers, what offset F/R allows both wheels to be flush with the fenders? Why does this seem to be a matter of opinion? Can't you just measure and figure it out?

I'm starting to think figuring our wheel offsets is a form of black magic.

:x
J.


The Team Dynamics will fit, but they are not flush in the rear, and will rub both front and rear when the car is lowered. "We know fits" is in reference to a stock alltrac.

A +30 offset is indeed perfect on a 9" wheel in front. My recommendation was for the rear, which requires less offset to be flush with the fender. note that the 050's people use are a +38, and will not clear stock suspension components without small spacers. The TD wheels and the sportmax wheels do not have the same offset.

In accordance with what I just mentioned, there is no offset that can be flush front and rear without using rear wheel spacers. You will need to run different offsets front and rear, run a spacer in the rear, or just deal with not having perfectly flush wheels.


Personally, my recommendation to the average joe is to get some 8" wide wheels in the diameter of your choice with a +32 to +40 offset, and then order a pair of H&R (NOT CHEAP EBAY) Wheel spacers in a 25mm DRM series, so that you don't need to get new studs. This way, you get a seriously mean look with minimal issues, even on a lowered car, and can run a tire that is somewhat close to stock rolling diameter. Considering that most of the people with 9" wide wheels on the alltrac have been mounting 255mm wide tires or less, most people really don't need any wider than an 8", since the recommended wheel size on most 245mm wide tires is an 8" rim, and the difference between a 245 and a 255mm tire is very minimal, and unless you're into frequent racing, you won't notice the performance difference.
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Postby Griffin » Tue May 01, 2007 5:18 pm

well for my part I have super lightweight 17 x 7.5s (SSR comps) with Yokohama Advan A032R H compounds on them, and I want more meat on the ground. I have 235 series tires and I want a substantial increase which means 9" wheels.

Mind you this is for track use - I will have R compounds on them and unles I go with A048s I will probably use them track only.
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Postby Griffin » Wed May 02, 2007 5:18 pm

I called SSR USA's 800 number oday and it put me through to tire rack - and they said they don't have a 7x9 5x100 and that they don't go custom on SSR. Bastards.

I called a lot of places and struck out this morning. CCW will do them but its about $2250 and they weight 20 pounds. I'm still trying to get a weight on the team Dynamics wheels.

I called sportmax and they don't have a 17x9 in 5x100 either

Volk has a 17x8.5 thats very light (14 lbs) the CE20N, but its a +40 offset so spacers might be required


I've also been looking at tires and the new BF Goodrige R1s sound REALLY nice, but the AVON RA1s are waaay cheaper.

I think I also decided I'll be going back to Yokohama for my street tires when the A032Rs wear out - going to move to a A048 hard compound
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Postby lumbercis » Thu May 03, 2007 5:49 am

Weight on the Team Dynamics should be about 20lbs based on this site http://www.wheelweights.net/

SSR Type C's are listed in 17x8 and 17x9 both with +35 standard offset. Don't know if either of these would fit us, but since they already make the bolt pattern and size, it may not be too difficult to order just a custom offset. These wheels are about the best compromise of weight v price out there. You can get some custom Volks, but for that size you are going to pay through the nose.

Whats the biggest tire you can fit on a 17x8? That may open up some more options.

J.
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Postby beppy » Sat May 05, 2007 6:12 pm

+42 mm offset might fit, but you have to look at the size of the tires you are using too.

heres a picture of the rear wheel using 17" x 7" wheel with +40mm offset with 215mm wheels.

Image

looks like theres some space left, but when i tried another wheel 17x7 et 42mm with 225mm tires. it didn't fit (damn should of took a picture of that)
so i think +42mm might work if you have 215mm tires.
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Postby CMS-GT4 » Thu May 10, 2007 3:44 pm

Anyone look into these?

17x8.5 35et 5x100. SSR.

I posted them a while ago in another thread. I might look at a set myself if I ever get new wheels.

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Postby CMS-GT4 » Mon Jun 04, 2007 9:56 pm

Some wheels worth looking into.

THey have a 16x9 size. There are 5/100 nbolt patterns but not sure which sizes.

SSR

http://www.more-japan.com/SSR_sp1r.php
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Postby CMS-GT4 » Fri Jun 08, 2007 2:29 am

Any idea what these wheels are? I have always thought these were some of the best looking wheels on a gtfour.

They look like the perfect width/et

Image[/img]
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Postby CDN-GT4 » Fri Jun 08, 2007 3:59 am

Conan wrote:
CMS-GT4 wrote:Any idea what these wheels are?

OZ Crono :shrug:


Chrono Evolution?

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Postby CMS-GT4 » Sun Jun 17, 2007 5:40 pm

These look like the new sportmax wheels. They offer a very low offset. Sort of oldschool, but I think a set might get you past needing a spacer.

http://gt4oc.com/album_pic.php?pic_id=5 ... 541777713e
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Postby smog7 » Mon Jun 18, 2007 4:18 pm

I posted that pic a long time ago...
I asked around on a miata forum to see what wheels they were, found out they are R.S. Watanabe F817 2-piece
http://www.rs-watanabe.co.jp/pay/al82pf817.htm
I think they look awesome.
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Postby Toxygene » Wed Jun 27, 2007 5:27 pm

Ok, lets see.

17x9 between 28 to 30 offset in front is perfect. That is a 17x7 rim and with 2 inches less that will mean that you could technically push that wheel farther in and choose a higher offset. I believe the offset is measured in Millimeters. (Anyone correct me if I"m wrong on that) So if 30 is perfect with a wheel width of 9 inches. Converting the 9 inches into Metric gives you 228.6 mm and your 7 inch rim is 177.79. The difference is 50.8. But remember that everything is from the center of the rim so you really gain about 25.4 of clearance on either side. What this means is while a 30 offset is perfect for a 9 inch rim. A 7 inch rim will no longer be flush with the fender but rather be 25.4 mm inwards from the fender. So now your choice was a 40 offset rim. This will now put the wheel at 35.4 mm farther inward from the fender. You will have 15.4 mm of space to spare from where a 9 inch rim would be with a 30 offset from the suspension components. This will effect the looks of the wheel as it will be farther inward inside the fender and not be flush. Using a 15 offset will push the wheel back towards the fender and will be 10.4 mm from being flush with the fender. You will also be 40.4 mm farther away from where a 9 inch wheel would sit giving you more space between the wheel and the suspension components.

You can play with the numbers as well and see what works for you. Let me know if you have any questions and by all means anyone who would like to look over my math, please do!

Hope that helps.
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Postby CMS-GT4 » Sun Aug 05, 2007 4:04 pm

In case anyone wants to spend the $$, Work does custom bolt patterns on their wheels.

http://www.workwheelsusa.com/wheels/
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Postby Meurz » Sun Aug 05, 2007 9:02 pm

Work Emotion CR Kai's have been discussed so many times now..

Anyhow.. click

You won't get the dished look though.
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