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Old 03-27-2008, 01:41 PM   #1 (permalink)
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I upped the PSI to my tires from 29 to 35 and...

My car actually is quieter! I inflated my tires to 5 PSI under what the sidewall says.

I will see how my gas mileage plays out once I travel to MN again.

Thanks everyone.

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Old 03-27-2008, 01:50 PM   #2 (permalink)
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When I worked at a local tire shop we always inflated cars to 35. As well as small trucks and suv's/minivans. Bigger stuff pretty much got the sidewall rating.
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Old 03-27-2008, 01:52 PM   #3 (permalink)
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Cool, that's good to know I have it at a good spot of 35. thanks...
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Old 03-27-2008, 01:55 PM   #4 (permalink)
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Originally Posted by MartialArtist View Post
Cool, that's good to know I have it at a good spot of 35. thanks...
Naw, bring it up to max (and beyond)
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Old 03-27-2008, 02:03 PM   #5 (permalink)
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Overinflated tire = wear in the middle of the tread.
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Old 03-27-2008, 02:04 PM   #6 (permalink)
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lol, I will tinker with it if I can see any gain in gas mileage...

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Naw, bring it up to max (and beyond)
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Old 03-27-2008, 02:13 PM   #7 (permalink)
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I'll take your words, will keep it at 35 since I am enjoying a more quieter ride now...


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Overinflated tire = wear in the middle of the tread.
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Old 03-27-2008, 02:15 PM   #8 (permalink)
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Overinflated tire = wear in the middle of the tread.
Prove it... Or, you need to dispose of bias tires you have and use a modern tire.

I've got my tires at 55/50 (Front/Rear) and have yet to have abnormal wear in nearly 20K miles Plenty of other members will attest the same thing

And that said, the ratings for a tire are for the max sidewall pressure.
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Old 03-27-2008, 02:18 PM   #9 (permalink)
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HOLY, 55 PSI Getting good gas mileage?

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Originally Posted by trebuchet03 View Post
Prove it... Or, you need to dispose of bias tires you have and use a modern tire.

I've got my tires at 55/50 (Front/Rear) and have yet to have abnormal wear in nearly 20K miles
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Old 03-27-2008, 02:22 PM   #10 (permalink)
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HOLY, 55 PSI Getting good gas mileage?
I follow the "Always be content, but never satisfied" model

And 55psi isn't a big deal. Search Google for "Factor of Safety" - it's one of the few engineering terms that's to the point in what it is I've been having trouble finding the FoS for modern tires, but bias ply tires were designed with an FoS between 4 and 11 with optimal FoS at 7. That's 7 times what's rated on the side. And, no doubt, modern tires at least meet this criteria. I'm not worried

Plus, added benefit of less tendency to hydroplane (something important to me given my location).

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