Let's talk about tire psi - Inflating to sidewall

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fleabag

Banned
Oct 1, 2007
2,450
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I've had great experience with inflating my tires to sidewall but it seems like there are a lot of dissenters out there who desperately cling to manufacturer suggestions of inflating tires to the PSI they desire. These people are so dogmatic that they wouldn't even dare do otherwise for it will risk tainting their values and what they hold true to themselves. You can give these people empirical evidence until you're blue in the face but unless there is a happy little sticker to accompanied said suggestion, they refuse to follow it. These people also don't seem to be aware that if one inflate their tires to 32psi when it's 32F outside that their tires would like be at the sidewall PSI rating or higher when it's 90F outside. The only things they're capable of knowing are those things can be readily found with google, as personal experience is not something they can relate to because sitting and home arguing with people over the internet about things they don't know about is so much easier.

Let me clarify a few things about tires, specifically radials.

Radial tires do NOT "balloon" when inflated unlike bias plys. The industry suggestion that your tires will wear down the very center is false when it comes to radial tires as this suggestion is a carryover from yesteryear's bias and bias ply tires.

Inflating your tires to sidewall or even twice the rating of sidewall isn't going to make them POP. For your viewing pleasure, I'm linking to a video of rednecks inflating a DRY ROTTED and SPLIT tire. http://www.youtube.com/watch?v=4hEUeRFQL9A That tire was inflated to at least 160psi, and very possibly 175 psi.

Overinflation is a relative term, a radial tire mounted in the front of a vehicle, inflated to sidewall is not going to wear down the very center compared to tire inflated to its "recommended level of inflation as indicated by the door jam". The only time "over inflation" to this level would be an issue is if a tire is mount on the rear of an unloaded pickup truck. In this case, I've actually seen the tires wear down the center before wearing down the sides.

Tires inflated to sidewall are less likely to: Hydroplane, overheat, wear unevenly, wear down the sides and will protect the rims in the event you crash into a curb,

Inflating your tires (at least front tires) to sidewall will result in better handling in most cases and better mileage in all cases. It is true that when you inflate your tires the ride will be more rough and this is due to the fact that the tires can no longer deflect in response to road irregularities like they used to.

Look, anybody can go on google and post links to the general consumer inquires part of a manufacturer or go to the AAA website and listen to those suggestions. But while those suggestions are to put the liability squarely with the car manufacturer, it doesn't give consumers the opportunity to figure out how to safely inflate their tires to suit their own needs.

It's amusing to have a general consensus that one would like good tire wear yet when I tell them what I did to achieve such perfectly even tire wear, I get calls for me to be banned and that I'm an idiot for doing such a thing. I've read about people claiming that they get good tire wear, or even tire wear when they inflate to the car manufacturer's recommendation but I'm calling bullshit. I've never EVER seen a car wear PERFECTLY EVENLY when inflated to the door jam recommendation. I'm sure I'll hear a lot of dissenters to claim otherwise but maybe the reason why is because what I consider horribly uneven others would consider good or "perfectly even". One way to check to see if a tire is wearing evenly is to cup your hand around the top corner of the tire and rub around the tire to see if it feels smooth or jagged. This works most effectively when visual inspection isn't able to provide enough conclusive evidence.

I always made a point to show the downsides of inflating your tires to higher than the door jam recommends but each and every time I'm bombarded with posts by people repeating the same rhetoric whether it be them criticizing me because of things I can't control and aren't relevant like my age or them creating straw man arguments by claiming that I'm disrespecting people's opinions that not only haven't even been made but aren't even participating in the discussion.

Anyone can post a link to a site discrediting what I'm saying, but I find that in MY EXPERIENCE AND OBVIOUSLY THAT OF OTHERS that there is overwhelming empirical evidence to state to the contrary of those sites. While those sites may be correct when something bad happens, what they aren't correct about is predicting what and when something bad will happen.


So, for those who have bothered to even try inflating their tires to the number printed on the sidewall, please feel free to post what you've found different with your car, listing the positives and negatives.

The opinions of JulesMaximus, PhoKingGuy, and PlasmaBomb are not welcome at this time.
locked by drpizza. Reason: wrong forum (that's why there's a garage forum.) Actually, if you believe in the multi-verse hypothesis, this isn't the particular universe that your bizarre laws of physics apply to, so... Wrong Universe.
 
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Demon-Xanth

Lifer
Feb 15, 2000
20,551
2
81
Inflating to the sidewall isn't what I'd call hazardous, but it's far from ideal. You'll wear the tires faster, get less traction, uneven wear, and a harsher ride. They won't pop though.
 

lxskllr

No Lifer
Nov 30, 2004
57,685
7,912
126
What's sidewall? Is that the stated max PSI? If so, that's what I always inflate my tires to.
 

hanoverphist

Diamond Member
Dec 7, 2006
9,928
23
76
Originally posted by: lxskllr
What's sidewall? Is that the stated max PSI? If so, that's what I always inflate my tires to.

same here. i do this due to the fact that im not a tire engineer, and i have no business telling the pros they are incorrect in their recommendations for tire pressure.
 

CRXican

Diamond Member
Jun 9, 2004
9,062
1
0
that would be stupid

I prefer my cars handle well because I like to drive
 

olds

Elite Member
Mar 3, 2000
50,061
720
126
Cars are designed to operate at specific tire pressures. Hence not using the sidewall rating.

Use this.
 

JulesMaximus

No Lifer
Jul 3, 2003
74,472
867
126
You're wrong.

Stop trying to convince people with far more driving experience than you (which is basically anyone with a driver's license) that you are right because you aren't. Get over it.
 

CRXican

Diamond Member
Jun 9, 2004
9,062
1
0
Originally posted by: hanoverphist
Originally posted by: lxskllr
What's sidewall? Is that the stated max PSI? If so, that's what I always inflate my tires to.

same here. i do this due to the fact that im not a tire engineer, and i have no business telling the pros they are incorrect in their recommendations for tire pressure.

it's not recommended, it's max

scary
 

JulesMaximus

No Lifer
Jul 3, 2003
74,472
867
126
Originally posted by: lxskllr
What's sidewall? Is that the stated max PSI? If so, that's what I always inflate my tires to.

Yeah, that's the number that the tire manufacturer says not to exceed.

Why anyone here should listen to fleabag, a kid who doesn't even own a car and has NEVER owned a car, is beyond me. He seems to think he's right but in reality he's just stubborn...and wrong.

I always inflate my tires to the cold specifications recommended by the manufacturer of the car. I've been doing this for hundreds of thousands of miles and dozens of cars I've owned. It has never failed to provide good, safe, handling characteristics, excellent brake feel, and even tire wear.
 

lxskllr

No Lifer
Nov 30, 2004
57,685
7,912
126
Originally posted by: JulesMaximus
Originally posted by: lxskllr
What's sidewall? Is that the stated max PSI? If so, that's what I always inflate my tires to.

Yeah, that's the number that the tire manufacturer says not to exceed.

COLD

It can go past that point when heated up through driving or summer use, but that is that stated COLD max. That's also not including the safety factor built into their number.
 

olds

Elite Member
Mar 3, 2000
50,061
720
126
Originally posted by: JulesMaximus
You're wrong.

Stop trying to convince people with far more driving experience than you (which is basically anyone with a driver's license) that you are right because you aren't. Get over it.

Did you not read the last line of the op.......



:laugh:
 

SunnyD

Belgian Waffler
Jan 2, 2001
32,674
145
106
www.neftastic.com

skyking

Lifer
Nov 21, 2001
22,220
5,082
146
I look at the load rating @ maximum pressure, and then use actual weights at each wheel to determine the inflation, and adjust from there.
For example the 20 ton equipment trailer I use at work can really only be loaded to 34,000 pounds on the two axles due to DOT laws. I see no point in using the maximum value and have the trailer dribble down the highway like a basketball when empty.
 

BrownShoes

Golden Member
Dec 28, 2008
1,055
0
0
Originally posted by: oldsmoboat
Originally posted by: JulesMaximus
You're wrong.

Stop trying to convince people with far more driving experience than you (which is basically anyone with a driver's license) that you are right because you aren't. Get over it.

Did you not read the last line of the op.......



:laugh:

LOL
 

JulesMaximus

No Lifer
Jul 3, 2003
74,472
867
126
Originally posted by: oldsmoboat
Originally posted by: JulesMaximus
You're wrong.

Stop trying to convince people with far more driving experience than you (which is basically anyone with a driver's license) that you are right because you aren't. Get over it.

Did you not read the last line of the op.......



:laugh:

:laugh: No, I did not...because I didn't actually read any of his post. I've read his illiterate scrawl before and called him out on it repeatedly but he won't listen to reason.
 

JulesMaximus

No Lifer
Jul 3, 2003
74,472
867
126
Originally posted by: SunnyD
Originally posted by: fleabag
Originally posted by: BeauJangles
So after getting owned in the garage forum, you bring this argument to OT?

http://forums.anandtech.com/me...id=85&threadid=2345466

Thread called on account of stupid.

Zenmervolt - AnandTech Garage Moderator

I thought I was posting in the garage but it's ok because I do benefit from having a different audience to post to.

Except that crossposting is against forums rules.

Shhh, we don't want this thread locked or the OP banned. It's too much fun watching him make a complete fool of himself. :laugh:
 
Reactions: brianmanahan

hanoverphist

Diamond Member
Dec 7, 2006
9,928
23
76
Originally posted by: CRXican
Originally posted by: hanoverphist
Originally posted by: lxskllr
What's sidewall? Is that the stated max PSI? If so, that's what I always inflate my tires to.

same here. i do this due to the fact that im not a tire engineer, and i have no business telling the pros they are incorrect in their recommendations for tire pressure.

it's not recommended, it's max

scary

thats why i put 28 in my truck that says 32 max
 
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