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Posts: 6,522
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Tire size & air pressures
I purchased Sumitomo HTR Z II from TireRack. Sizes are 255/40-17 rear & 225/45-17 front. OEM's for my car were 215/60-15 rear & 185/70-15 front. I was curious about what pressures to run so I called. The sales guy told me the tire pressures would be the same, 29lbs. for the front and 36 lbs. for the rears cold. I guess it's my ignorance but I never thought they'd be the same pressures. I know we have excellent tire/wheel guys here so could you guys confirm this for me.
Thanks in advance.
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O2 In Sully We Believe |
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03-02-2009, 10:18 AM
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There are 2 things that have been etched in my mind regarding my carrera's tires: 29 and 36 mean smooth and right!
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03-02-2009, 10:27 AM
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I would experiment a bit if I were you, You will find a sweet spot for your car and style.
Just as an anecdotal date point, I haven't found much difference in the tp needs between 16 and 17
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Bill Verburg '76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone) | Pelican Home |Rennlist Wheels |Rennlist Brakes | |
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03-02-2009, 10:32 AM
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Thanks to both. I will experiment a bit as I'm planning on my first DE this summer at Lime Rock Park.
Nice arse djk 
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03-02-2009, 10:37 AM
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track pressures will be different from street.
What tires are you using?
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Bill Verburg '76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone) | Pelican Home |Rennlist Wheels |Rennlist Brakes | |
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03-02-2009, 10:41 AM
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Bill, The tires I mentioned above... Sumitomo HTR Z II. Sizes are 255/40-17 rear & 225/45-17 front.
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O2 In Sully We Believe |
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03-02-2009, 10:59 AM
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Jupiter 911
Join Date: Sep 2007
Location: Jupiter Fl
Posts: 663
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Buck, just purchased the exact same tires, also from tire rack. Could not resist the price, anyway I am sticking with 29 lbs in the front and 36 lbs in the rear.
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Lenny-1987 3.2 Targa Guards Red/SW Chip Fabspeed Exhaust/Cat bypass MSDS Inc. intake/Clewetts Euro pistons and cylinders. 2002 Boxster Artic Silver/Wifes ride. |
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03-02-2009, 12:44 PM
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3.2 Carrera
1976 Porsche Carrera 3.0
1995 Porsche 993 Carrera Coupe
