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post #1 of 53 (permalink) Old 12-28-2014, 01:46 PM Thread Starter
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15''s

I spent all of my 2014 season fighting traction issues on a track pack 2006 Exige with Katana S/C with old Z1 tires w/no diff. I borrowed my friends Toyo 888s mid season and finished with a top 8 raw time(out of 100+cars) result. I have since replaced the tires with 2014 formula RS3 tires and the mods listed below. After seeing posts by Phil, ///MD, and driftwood I have been set on purchasing a 15" race wheel set up for the upcoming race season. I don't run SCCA, so class rules do not matter to me, I run with a group that is "run what you brung" The plan was 15x8F and 15x9R, but now I am thinking about going either 15X8(+25) square or 15X9(+36 until I run spacers) square. Can you fit a 15x9 front (on an exige) without body work? If I go 15x8 I was thinking about going 225/45/15F and 225/50/15R to maintain some of the rake.

My current set up is Ohlins with 425F/550R (corner balanced) 125/135 ride heights, aftermarket steering arms, supercharged.
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post #2 of 53 (permalink) Old 12-28-2014, 02:07 PM
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Do you need a 225 in the front? The 205 is generally plenty.
This bring one back to 15x8 and 15x9.
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post #3 of 53 (permalink) Old 12-28-2014, 08:25 PM
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You should be OK with 9" on the rear.

IMO, the bigger issue might be the 15x8" on the front. Since you're exige, you should be fine. On the elise, the 15x7 is a much easier fit, as the exige front fenders are just a touch wider than the Elise.

What wheels are you going with? Go as light as possible! 949 has some 8s and 9s that should do the trick, FWIW...

-Phil


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post #4 of 53 (permalink) Old 12-29-2014, 08:10 AM Thread Starter
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You should be OK with 9" on the rear.

IMO, the bigger issue might be the 15x8" on the front. Since you're exige, you should be fine. On the elise, the 15x7 is a much easier fit, as the exige front fenders are just a touch wider than the Elise.

What wheels are you going with? Go as light as possible! 949 has some 8s and 9s that should do the trick, FWIW...

-Phil
Thanks Phil, I was thinking about going with these. 11lb F and 12lb rear



Can you fit a 275 on the rear with poking or hitting the fenders? If not I will be stuck with 225s on the rear.
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post #5 of 53 (permalink) Old 01-10-2015, 04:32 PM
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I run an S2 Exige NA 2ZZ with 15" front 205/50 and 16" rear 215/50 (actually 229 section but Yokohama AO50 have strange sizes). I win most events I enter against a field of S2 and S1's including supercharged. Lighter wheels and cheaper rubber. Can't go wrong. See a quickish lap here.

http://youtu.be/sDVeKFyG1Hs
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post #6 of 53 (permalink) Old 01-10-2015, 09:33 PM
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Thanks Phil, I was thinking about going with these. 11lb F and 12lb rear



Can you fit a 275 on the rear with poking or hitting the fenders? If not I will be stuck with 225s on the rear.
Sharp looking wheel! Let us know how it works out...

275s without trimming? Probably not. 245s will fly...

-Phil


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post #7 of 53 (permalink) Old 01-11-2015, 12:09 AM
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... If not I will be stuck with 225s on the rear.
Will you be missing much from 225 versus 275s?
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post #8 of 53 (permalink) Old 01-11-2015, 02:34 AM
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I would spend at least an equal amount of time researching the tire weight as you have wheel weight. Tires being further outwards from the center are even more important with regards to rotational weight.

If you're only going to run 245s on the rear maybe you should just go with the 15X8 in the rear to save some more weight. I'll let Phil chime in.

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post #9 of 53 (permalink) Old 01-11-2015, 04:38 AM
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What tires are people running on 15x9R?

Jason

06' Fed Elise

My frame, rear subframe, steering rack, A-arms, front crash structure, suspension uprights, and fuel tank are stock.
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post #10 of 53 (permalink) Old 01-11-2015, 06:41 AM Thread Starter
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Thanks for the great feedback everyone!
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post #11 of 53 (permalink) Old 01-11-2015, 07:03 AM
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Is there a list of 15" wheels that will fit our 2 pot calipers?
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post #12 of 53 (permalink) Old 01-11-2015, 11:53 AM
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Is there a list of 15" wheels that will fit our 2 pot calipers?
The list of rotors is more important than the list of calipers.
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post #13 of 53 (permalink) Old 01-14-2015, 07:55 AM
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I don't think there's a running list...

Would be good to compile one though.

Easiest way to search for them is looking for Miata wheels on google. With spacers, most can be made to fit.

949 and Enkei are the main ones we use. They're cheap, light, and easy to get. Those new ones surfer found look nice too.

-Phil


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post #14 of 53 (permalink) Old 01-14-2015, 08:42 AM
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Phil, which enkies did you find that fit well? My understanding is that they don't fit unless using some type of spacer which I would like to avoid.
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post #15 of 53 (permalink) Old 01-14-2015, 09:18 AM Thread Starter
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I've found alot on here
Mazda Parts from Good-Win Racing - Mazda Performance Specialists

Running spacers is going to be a must for the most part though. Spoke design is important also, I attempted to fit a friend's 15X8 wheel on the car, but it was a flat spoke design and it hit the caliper, a spacer would fix it, but I didn't have any on hand. Also, when looking at Miata wheels watch out for the hub size. I believe we are a 56.6

Last edited by Silver_Surfer; 01-16-2015 at 05:52 AM.
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post #16 of 53 (permalink) Old 01-14-2015, 09:46 AM
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Phil,
Do the 949's need spacers? If yes, do you know how thick, and do you use hub-centric spacers?
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post #17 of 53 (permalink) Old 01-14-2015, 11:55 AM
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What wheels are those?

EDIT: nevermind, advanti S1
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post #18 of 53 (permalink) Old 01-18-2015, 11:29 AM Thread Starter
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So I picked up a cheap set of 13lbs ce28 (15x8) knock offs for $350. Not sure what tires I'm going to run yet though.
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post #19 of 53 (permalink) Old 01-18-2015, 12:13 PM
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Keep in mind that your rear tires need to be larger than the fronts if you are still running ABS, it will flip out of you if you do not get it matched right. By the stock size calculations your rears should be 105.5% of the fronts
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post #20 of 53 (permalink) Old 01-18-2015, 12:30 PM Thread Starter
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Keep in mind that your rear tires need to be larger than the fronts if you are still running ABS, it will flip out of you if you do not get it matched right. By the stock size calculations your rears should be 105.5% of the fronts
This worried me at first, but Phil posted in an earlier thread that he ran 22in tires for an entire season without incident. Knock on wood*
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