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GT S197 General Discussion This section is for technical discussions pertaining specifically to the V8 variation of the 2005 and newer Ford Mustang.

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Old 08-21-2012, 06:05 AM   #1
ghunt
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Default What tire pressure for 255/50R17?

I just had some 255/50R17's mounted on my stock wheels- so much better than the 225/55R17's the previous owner had on there!

However, they have 32 psi on them and it almost seems a little low. They ride so nice it almost feels like there's not enough air pressure in them. Do I need to run more with these?
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Old 08-21-2012, 06:19 AM   #2
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Assuming they are 44psi rated tires, 32psi is fine. You could put a few more in it if you like however. Experiment
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Old 08-21-2012, 12:31 PM   #3
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I run 35 psi and it feels a lot better than when I had them at 32.
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Old 08-21-2012, 12:33 PM   #4
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Like baddog671 said you can just add 1 psi, drive it for a little while and see if you like it better. I wouldn't go any higher than 35psi tho
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Old 08-21-2012, 12:41 PM   #5
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That's the size I'm considering for my 17x8 bullitts
Possibly the Nitto NT555 255/50/17
What tires did you get?
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Old 08-21-2012, 10:38 PM   #6
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can you post pics please from the rear showing how wide they look, and from the front too??

I wanna change my 235/55R17 to 255/50r17 on my gt wheels
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Old 08-21-2012, 10:45 PM   #7
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Quote:
Originally Posted by French_Frize View Post
Like baddog671 said you can just add 1 psi, drive it for a little while and see if you like it better. I wouldn't go any higher than 35psi tho
Even if he leaves them at 32psi, they are probably ~35psi while he's driving. Expansion...

Just keep it in the 30-40 range wherever makes you happy. It's not gonna break anything.
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Old 08-22-2012, 06:02 AM   #8
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I'll try to get some pics, I don't have a phone with data so I can't just upload pics on a whim unfortunately Will have to break out the ol' digital camera and get some maybe Thursday.

Also, these are the NT555's. They seem nice so far but I've got a little shake in the front end-when they balanced then I asked them to just put the weights on the inside of the wheel and maybe they didn't quite balance. They do ride better than the 225/55R17 Sumitomo Srixons that were on there, and they have a hell of a lot more traction too.
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Old 08-22-2012, 06:02 AM
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