996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

19" Tire Sizing

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Old Mar 21, 2004 | 08:48 PM
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19" Tire Sizing

I have read prior posts where most recommend 235/35/19s in the front and 315/25/19s in the rear. The new Michelin Pilot Sport PS2 tires have the following specs:

Sizes Overall Diam. Revs Per Mile
225/35YR19 25.2" 824
235/35YR19 25.5" 817
315/25YR19 25.2" 824

Would it be more beneficial to match the front and rear diameters or use the 235 and have more rubber on the ground in the front? The specs on the stock Pirelli tires do not match exactly and I know the coupler has some room for diameter differences from front to rear.
 
Old Mar 22, 2004 | 12:29 AM
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Re: 19" Tire Sizing

Originally posted by ee996tt
I have read prior posts where most recommend 235/35/19s in the front and 315/25/19s in the rear. The new Michelin Pilot Sport PS2 tires have the following specs:

Sizes Overall Diam. Revs Per Mile
225/35YR19 25.2" 824
235/35YR19 25.5" 817
315/25YR19 25.2" 824

Would it be more beneficial to match the front and rear diameters or use the 235 and have more rubber on the ground in the front? The specs on the stock Pirelli tires do not match exactly and I know the coupler has some room for diameter differences from front to rear.
They available yet in 315 rear?? I heard not for like 2-3 months!

Lou
 
Old Mar 22, 2004 | 10:46 AM
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Re: 19" Tire Sizing

Originally posted by ee996tt
I have read prior posts where most recommend 235/35/19s in the front and 315/25/19s in the rear. The new Michelin Pilot Sport PS2 tires have the following specs:

Sizes Overall Diam. Revs Per Mile
225/35YR19 25.2" 824
235/35YR19 25.5" 817
315/25YR19 25.2" 824

Would it be more beneficial to match the front and rear diameters or use the 235 and have more rubber on the ground in the front? The specs on the stock Pirelli tires do not match exactly and I know the coupler has some room for diameter differences from front to rear.
Ideally, an exact match would be the best, but the .3" differential is well within the tolerance of the Turbo's AWD system. Also, keep in mind that most of the 19" front rims are 8.5" wide and a 225 tire is stretching things.
 
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