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I think the rims I have are too big right now, plus I want to get tries for auto x only. What size and kind of rim is optimal?
 

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What class are you going to run in? What tires/sizes? Budget?
 

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16x12 rims are nice in CP.
I'm running little 17x9 in SM. Some folks like 17x11 or 17x12, but I didn't want the extra cost and car width for a little extra grip in sweepers.
 

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If your going to be running SCCA in the FS class then you have to stay with the rim sizes available from the factory.

Dave Schotz, the guy that won FS in '04 ran on bogart race wheels 17x8 on his mach 1 with 275/40/17 Kumho Ecsta V710. Also running this size tire with 3.55 gears would equal 3.76 gearing. This would be great if it were only a track wheel and tire since the speedo could not be recalibrated at least not in the 05 because you cannot change computer settings.http://sccaforums.com/forums/57319/ShowPost.aspx

Stock rims are 21.6lbs if you dropped that to say 14.5 or the SSR Competition 17x8 wheels it would be like adding 25rwtq(at least according to the spread sheet I found for the loss in weight).
This article has the spread sheet look at the updated one. I am trying to add in drive shaft specs on it right now. Does anyone know the stock weight and size of the stock 05 Mustang GT flywheel, and drive shaft?
http://www.mazda6tech.com/Articles/Maintenance/index.php?option=com_content&task=view&id=16&Itemid=50

If you go up to ESP you can run any size wheels you want. When I move up I will be sticking with a 17x9 or 17x10 rim and probably trying to get a set of bogart light racing wheels to add that extra power or at least keep the weight the same.

That mazda6 website has a lot of good info that I couldn't find anywhere else shy of asking a race team.
 

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stangerjon said:
13" brakes call for 17" wheels. some 17X9 wheels that are light with 275/45 kumho V710's would be great for autoX.
Some 16 inch wheels will clear 13 inch brakes.
I run 16 x12 RealRacing wheels, about 14.5 pounds, over cobra brakes. It did take very minor clearancing, and I've talked to some who run vette calipers with no issues at all.
 

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SoftBatch said:
Dave Schotz, the guy that won FS in '04 ran on bogart race wheels 17x8 on his mach 1 with 275/40/17 Kumho Ecsta V710. Also running this size tire with 3.55 gears would equal 3.76 gearing. This would be great if it were only a track wheel and tire since the speedo could not be recalibrated at least not in the 05 because you cannot change computer settings.http://sccaforums.com/forums/57319/ShowPost.aspx
Where are you getting that gearing number? Stock tire size on his old car is 245/45/17, which equals out to a 25.6811 inch diameter. The 275/40/17 equals out to a 25.6614 inch diameter. That is less than a tenth of a percent different in diameter. That isn't going to result in a gearing change you can feel.
 

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sjrife1 said:
Where are you getting that gearing number? Stock tire size on his old car is 245/45/17, which equals out to a 25.6811 inch diameter. The 275/40/17 equals out to a 25.6614 inch diameter. That is less than a tenth of a percent different in diameter. That isn't going to result in a gearing change you can feel.
I was going off the '05 Stock Tire size, there would be no change in effective gearing going from 245/45/17 to 275/40/17
 

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The real deal Cobra R 17x9 R58 is 19lbs

Its the best bang for the buck
 
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