Tire pressure?

[1stToyota]

Originally Posted by yarswiss

Had them at 45 psi for about 6 months, and have now had them at 50psi for the last 4 months. No problems to report, and while I haven't noticed a significant increase in fuel efficiency, my rolling distances have increased when not using gas.

I have actually hit a few curbs and ruts that blew out a set of tires I had before at 32psi, and they didn't show any damage when I hit the same curbs with my current 50psi tires.

Try a panic stop at 70mph, one with 50 or 60psi in the tires, one with 32psi...see if the over-inflated tires do as well in the braking test as they did in the rut test.

[nemelek]

I have been involved in 2 personal injuries lawsuits in my life. One has the plaintive and the other has the defendant. From my experience, I certainly wouldn’t put anything past lawyers or insurance companies. Running tires over or under inflated is a persons personal decision, that I respect. However, if I was way out of Toyota guidelines I would not post my PSI on the internet. It could be a decision that would bite me in the ass at a later time. The same goes for oil viscosity.

[1stToyota]

Originally Posted by nemelek

I have been involved in 2 personal injuries lawsuits in my life. One has the plaintive and the other has the defendant. From my experience, I certainly wouldn’t put anything past lawyers or insurance companies. Running tires over or under inflated is a persons personal decision, that I respect. However, if I was way out of Toyota guidelines I would not post my PSI on the internet. It could be a decision that would bite me in the ass at a later time. The same goes for oil viscosity.

The way I look at it, if running nearly double the psi in my tires was the new super-magic way to see increased fuel economy, every single car company would have jumped on that free bandwagon years ago. They haven't because they want their customers to have a balance of handling, braking and fuel economy, not tilt the scales totally in favor of a 20% increase of fuel economy for their products.

[b_hickman11]

Did any of these "test" have a deer involved? I almost hit 3 different deer this week...one of which I had to massively slam on the brakes to avoid hitting it. I would assume with double the air pressure(and less road contact) I might would have had a different outcome. Like maybe some back strap for Christmas dinner.

[BailOut]

Panic stops do not happen to those that pay attention on the road and plan ahead. This holds true even if your fellow drivers fail to do so. On the few occasions that I have needed to brake any harder than usual I experienced no difficulty whatsoever at 60 PSI.

As for deer, yes, I run into them on the roads here, too. Also coyotes, quail, rabbits and the occasional black bear. I have never had difficulty avoiding them.


All,

There simply is no room in fuel economy discussions for alarmism or "doomism". Please stop with the venom and rhetoric or I will have this thread locked.

[1stToyota]

Originally Posted by BailOut

Panic stops do not happen to those that pay attention on the road and plan ahead. This holds true even if your fellow drivers fail to do so. On the few occasions that I have needed to brake any harder than usual I experienced no difficulty whatsoever at 60 PSI.

As for deer, yes, I run into them on the roads here, too. Also coyotes, quail, rabbits and the occasional black bear. I have never had difficulty avoiding them.


All,

There simply is no room in fuel economy discussions for alarmism or "doomism". Please stop with the venom and rhetoric or I will have this thread locked.

Triple what Toyota states for psi, you have all the built-in excuses required. Hope a semi never locks his brakes, smoking all of his trailer tires, like what happened to me last sat.

It's winter now. People drives like idiots in a hurry. Road conditions won't be that great in many areas due to the weather and road treatment (lots of sand on the ground here)

Safety is more important than fuel economy, especially in a small car that already gets 40 mpg anyway

Call up the auto makers with the revolutionary idea of running double the psi, tell them the easy way to increase the fuel economy numbers by 20% ...I'll expect them to slap their foreheads and turn their tires into 60psi basketballs soon as they hang up the phone...NOT!

[b_hickman11]

Originally Posted by BailOut

Panic stops do not happen to those that pay attention on the road and plan ahead. This holds true even if your fellow drivers fail to do so. On the few occasions that I have needed to brake any harder than usual I experienced no difficulty whatsoever at 60 PSI.

As for deer, yes, I run into them on the roads here, too. Also coyotes, quail, rabbits and the occasional black bear. I have never had difficulty avoiding them.


All,

There simply is no room in fuel economy discussions for alarmism or "doomism". Please stop with the venom and rhetoric or I will have this thread locked.

Aww am I upsetting the baby since his views are the same as mine....awww

[gid]

What ? PLAN AHEAD ! There's no planning for a deer that decides to bolt out in front or into the side of your vehicle from over an embankment or from thick brush / wooded area . This has to be the dumbest ( ) thing stated on this topic so far .

[YarisSedan]

Originally Posted by gid

What ? PLAN AHEAD ! There's no planning for a deer that decides to bolt out in front or into the side of your vehicle from over an embankment or from thick brush / wooded area . This has to be the dumbest ( ) thing stated on this topic so far .

So your saying you dont have the ability to forsee 5 seconds into the future to make planned decisions accordingly. And I thought i was the only one.

[BailOut]

Originally Posted by gid

What ? PLAN AHEAD ! There's no planning for a deer that decides to bolt out in front or into the side of your vehicle from over an embankment or from thick brush / wooded area . This has to be the dumbest ( ) thing stated on this topic so far .

It's called driving slower when you are in a known trouble area. I am surprised that you were not smart enough to figure that out for yourself.

[1stToyota]

Originally Posted by BailOut

It's called driving slower when you are in a known trouble area. I am surprised that you were not smart enough to figure that out for yourself.

I hope you're never involved in an accident, no matter who's at fault, but if you are I hope you're smart enough (and brave enough) to tell the officer and the adjuster that you run double the psi that Toyota recommends. But what am I thinking, you've already convinced your insurance agent to run double psi to save fuel, like you're doing, yes?

[gid]

Originally Posted by BailOut

It's called driving slower when you are in a known trouble area. I am surprised that you were not smart enough to figure that out for yourself.

you take the cake .

[YarisSedan]

Originally Posted by gid

you take the cake .

Yeah. Thats why i just stopped responding to his post and future posts. Some people will belive they are right no matter what evidence you bring up to prove they are wrong. And they will try to find a flaw in everything you say to them or use as evidence in order to keep saying they are right. Its just a waste of time those type of poeple can not be reasoned with.

[Pitt Yaris]

Originally Posted by gid

What ? PLAN AHEAD ! There's no planning for a deer that decides to bolt out in front or into the side of your vehicle from over an embankment or from thick brush / wooded area . This has to be the dumbest ( ) thing stated on this topic so far .

I agree with these comments 100%. Can't believe some people's logic. I guess some posters are one with nature....

[YarisSedan]

Here are some reputible, reliable sources of information that will tell you all you would ever want and need to know about tires and tire pressure to put this post to rest. If the quotes interest you click on the link to read the complete articles

http://www.betiresmart.ca/resources/...oc2=faqs#faq03
"Is over-inflation harmful?
Yes. One of the biggest tire maintenance-related myths is that over-inflation is not a problem. Often, even people who understand that under-inflation is a problem are unaware of the harmful effects of over-inflation.

An over-inflated tire rides on just the centre portion of the tread. The smaller contact area means reduced grip on the road leading to a harsh ride, handling issues (such as steering and stopping problems) and increased wear on tires and suspension components.

What should I do if my tires are over-inflated?
If you find that your tires are over-inflated, release air by pushing on the metal stem in the center of the valve, then re-measure the pressure. Never reduce pressure when tires are hot. Wait until they are cold, meaning that your vehicle has been stationary for at least 3 hours or has not been driven more than 2 km."

http://www.popularmechanics.com/blog...s/4199963.html

"Debunking a Mileage Myth: Can You Really "Pump Up" Your Fuel ..."

http://www.tirestamp.com/index.php?o...139&Itemid=177

"Question: Is my tread wear effected by overinflation?

Answer: Overinflation is almost as bad as underinflation. Overinflation is any pressure that exceeds the pressure needed to carry the load by 10% or more. Just as with underinflation, overinflation changes the footprint too. The contact patch actually becomes shorter and narrower. This results in the shoulders of the tire scuffing along while only the center of the tire makes full contact with the road which leads to irregular wear patterns and lost tread mileage. Center rib wear, flaking, chunking, erratic depression wear are commonly observed conditions in addition to overall rapid tread wear. A tire that is overinflated by 20% will lose 10% of its tread mileage. In addition, traction is negatively impacted since the contact patch is much smaller than is optimal. The ride is harsher since the sidewall is much stiffer and handling is different since the footprint has changed. Vehicle suspension and steering system components are also affected by the harsher ride and handling due to over inflation. Overinflated tires are also prone to cuts and snags, impact breaks, and sidewall and crown penetrations affect a vehicle’s handling. "

[SilverGlow]

Originally Posted by YarisSedan

Here are some reputible, reliable sources of information that will tell you all you would ever want and need to know about tires and tire pressure to put this post to rest. If the quotes interest you click on the link to read the complete articles

http://www.betiresmart.ca/resources/...oc2=faqs#faq03
"Is over-inflation harmful?
Yes. One of the biggest tire maintenance-related myths is that over-inflation is not a problem. Often, even people who understand that under-inflation is a problem are unaware of the harmful effects of over-inflation.

An over-inflated tire rides on just the centre portion of the tread. The smaller contact area means reduced grip on the road leading to a harsh ride, handling issues (such as steering and stopping problems) and increased wear on tires and suspension components.

What should I do if my tires are over-inflated?
If you find that your tires are over-inflated, release air by pushing on the metal stem in the center of the valve, then re-measure the pressure. Never reduce pressure when tires are hot. Wait until they are cold, meaning that your vehicle has been stationary for at least 3 hours or has not been driven more than 2 km."

http://www.popularmechanics.com/blog...s/4199963.html

"Debunking a Mileage Myth: Can You Really "Pump Up" Your Fuel ..."

http://www.tirestamp.com/index.php?o...139&Itemid=177

"Question: Is my tread wear effected by overinflation?

Answer: Overinflation is almost as bad as underinflation. Overinflation is any pressure that exceeds the pressure needed to carry the load by 10% or more. Just as with underinflation, overinflation changes the footprint too. The contact patch actually becomes shorter and narrower. This results in the shoulders of the tire scuffing along while only the center of the tire makes full contact with the road which leads to irregular wear patterns and lost tread mileage. Center rib wear, flaking, chunking, erratic depression wear are commonly observed conditions in addition to overall rapid tread wear. A tire that is overinflated by 20% will lose 10% of its tread mileage. In addition, traction is negatively impacted since the contact patch is much smaller than is optimal. The ride is harsher since the sidewall is much stiffer and handling is different since the footprint has changed. Vehicle suspension and steering system components are also affected by the harsher ride and handling due to over inflation. Overinflated tires are also prone to cuts and snags, impact breaks, and sidewall and crown penetrations affect a vehicle’s handling. "

Those links you reference are mostly bool sheet.

And in fact, I have my tires all pumped up at 45 PSI, and:

(1) My milage is about 12% higher.

(2) My tires are wearing EVENLY across the thread. Center of tire shows EXACTLY THE SAME as the shoulders of all tires.

(3) My tires are about 80% worn, and after 52,000 miles. At that rate I should get at least 65,000 before I the wear indicators show.

(4) The degration in handling and grip is INSIGNIFICANT.

So you see, you can't always believe everything you read on those "expert" sites.

[1stToyota]

Originally Posted by SilverGlow

Those links you reference are mostly bool sheet.

And in fact, I have my tires all pumped up at 45 PSI, and:

(1) My milage is about 12% higher.

(2) My tires are wearing EVENLY across the thread. Center of tire shows EXACTLY THE SAME as the shoulders of all tires.

(3) My tires are about 80% worn, and after 52,000 miles. At that rate I should get at least 65,000 before I the wear indicators show.

(4) The degration in handling and grip is INSIGNIFICANT.

So you see, you can't always believe everything you read on those "expert" sites.

12% higher? That seems like a pretty good number for you...I think that's about what the Lucas f.i. cleaner did for you.

And if your tires are 80% worn, grip and handling are already WAY down from what it was when your tires had 50+% tread left on them. Most tire *experts* believe in the Washington's head rule now instead of the old Lincoln's head rule. Stopping distance for the latter can be up to twice the distance.

[gid]

we've had deer dart out from between homes within city limits during daylight hours . So you can't always be prepared MR.PERFECTO . The deer are running out of habitat and with the warmer climate of recent years there's been a population explotion . Therefore they're more active in the day looking for food . MAYBE YOU SHOULD EXPLAIN THAT TO THE DEER HERE AND EVERYWHERE .