Tire Pressure Max - Page 5 - Toyota Yaris Forums

eco · 04-17-2007, 09:33 PM

I will never agree with 60 psi on a 44 psi max tire.I will say this,I try to find the exact pressure for stability,comfort and gas savings and still be safe,I use37psi on a 50psi max tire,my temperature may hit 44psi in the course of a 1hour trip,still no where near 50psi for my tire,I have just found this to be the sweet spot for all 3 stab.,com.,gas sav.,.When I was using the the 44psi max tire I used 38psi,that was the sweet spot for my setup,its all trial and error,but never exceed 44psi when tire is checked cold,the tire will hold 44 cold,and can withstand the increase of psi when the tire is heated up.
Remeber folks,there is no tire making procedure that is 100% all the time,if tire is faulty,and you exceed max psi,then you will more then likely have a problem,think about it.

Nimble · 04-17-2007, 10:16 PM

Tires are not meant to be run at MAX PSI! Are you kidding me? Seriously, the poster saying he runs SIXTY LBS has got to be kidding. 34 tops on most passenger tires, and 40 on very low profile ones.

Yaris Revenge · 04-17-2007, 11:28 PM

Yeah, I agree BMG. I'm not crazy about the over-inflation, but that part isn't really what concerns me so much about hypermiling. The techniques that I find more worrisome are speeding onto downhill offramps/onramps to maintain momentum, drafting (aka tailgating!), killing the engine while running downhill (which kills power brakes and steering on most cars), etc. That just seems a little crazy.

I fully expect that later down the road hypermiling will be recognized as a disease, like alcoholism, that affects addictive personalities. Some people can get into it and have a little fun, but know when to quit, while others go totally insane, like that other guy mentioned in the article. I've read about him before... never runs AC, actually pushes his car out into the road to save that extra 20 feet, etc.

~YR

BMGYaris · 04-18-2007, 12:08 AM

hum, i think at that point its obviously not financial. But if it was a matter of envrionmental concerns then surely other things that he is doing in his life have such a greater impact on the environment that those 20 feet are completly irrelevant. so i figure it cant really be about environmental concern or he would be out living on horse back and nature...i wonder what other motive it could be....

BMGYaris · 04-18-2007, 12:53 AM

WELL, maybe not talking on the cell phone...but a few days ago I was browsing the internet on the interstate....maybe yes on that.

oh, and is not talking on the cell phone part of hypermilling techniques?

Nautical Yaris S · 04-18-2007, 12:58 PM

personally, i wouldn't put my tires past 45psi.
especially since I live in the valley where the temperature gets to 114+ degrees all summer long.

marcus · 08-05-2007, 01:28 PM

i got front tires on 44psi and back tires on 40 psi .. thats if the air pump pressure meter really is accurate..

TLyttle · 08-09-2007, 10:47 PM

Yeah, me, too. In the old days, radials got better mileage at high pressures (smaller contact patch), better traction at lower pressures (larger contact patch). I cannot assume that the logic of this has disappeared, but I have seen no major changes in tire technology that would challenge it. I used to dump my Michelins down to as low as 15lbs for heavy snow conditions, and went where no snow tire would go!

The smaller contact patch, however, generates less heat, so it is possible that lower pressure only benefits the tire companies. I also found that higher pressures had more sidewall stability ("creep"), and gave more precise steering.

But that's just my experience; I was running radials before they were even legal in some states!

reznunt · 08-10-2007, 02:07 AM

damn 60 psi, it must feel like you're driving a damn tank to work.

Black Yaris · 08-10-2007, 10:44 AM

ok out of control, and not worth debating and fighting over AGAIN!!!... done

04-17-2007, 10:16 PM	#2
Nimble Modification Condoner. Drives: 2007 Black Sand Liftback Join Date: Jan 2007 Location: Chicago, IL Posts: 360	Tires are not meant to be run at MAX PSI! Are you kidding me? Seriously, the poster saying he runs SIXTY LBS has got to be kidding. 34 tops on most passenger tires, and 40 on very low profile ones. __________________ Tanabe DF, Debadged, stripped, Black emblems

04-17-2007, 11:28 PM	#3
Yaris Revenge GIGA...DRILL...BREAKER!!! Drives: Lagann. ;P Join Date: Feb 2006 Location: My own little world. Posts: 717	Yeah, I agree BMG. I'm not crazy about the over-inflation, but that part isn't really what concerns me so much about hypermiling. The techniques that I find more worrisome are speeding onto downhill offramps/onramps to maintain momentum, drafting (aka tailgating!), killing the engine while running downhill (which kills power brakes and steering on most cars), etc. That just seems a little crazy. I fully expect that later down the road hypermiling will be recognized as a disease, like alcoholism, that affects addictive personalities. Some people can get into it and have a little fun, but know when to quit, while others go totally insane, like that other guy mentioned in the article. I've read about him before... never runs AC, actually pushes his car out into the road to save that extra 20 feet, etc. ~YR __________________ Be polite. Be professional. But have a plan to kill everyone you meet.

08-10-2007, 10:44 AM	#10
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	ok out of control, and not worth debating and fighting over AGAIN!!!... done __________________

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04-17-2007, 09:33 PM	#1
eco Drives: 2007 Black Yaris sedan Join Date: Sep 2006 Location: Atlanta Posts: 884	I will never agree with 60 psi on a 44 psi max tire.I will say this,I try to find the exact pressure for stability,comfort and gas savings and still be safe,I use37psi on a 50psi max tire,my temperature may hit 44psi in the course of a 1hour trip,still no where near 50psi for my tire,I have just found this to be the sweet spot for all 3 stab.,com.,gas sav.,.When I was using the the 44psi max tire I used 38psi,that was the sweet spot for my setup,its all trial and error,but never exceed 44psi when tire is checked cold,the tire will hold 44 cold,and can withstand the increase of psi when the tire is heated up. Remeber folks,there is no tire making procedure that is 100% all the time,if tire is faulty,and you exceed max psi,then you will more then likely have a problem,think about it.

04-18-2007, 12:08 AM	#4
BMGYaris Drives: Yaris 3dr Hatchback Join Date: Oct 2006 Location: South Carolina, USA Posts: 255	hum, i think at that point its obviously not financial. But if it was a matter of envrionmental concerns then surely other things that he is doing in his life have such a greater impact on the environment that those 20 feet are completly irrelevant. so i figure it cant really be about environmental concern or he would be out living on horse back and nature...i wonder what other motive it could be....

04-18-2007, 12:53 AM	#5
BMGYaris Drives: Yaris 3dr Hatchback Join Date: Oct 2006 Location: South Carolina, USA Posts: 255	WELL, maybe not talking on the cell phone...but a few days ago I was browsing the internet on the interstate....maybe yes on that. oh, and is not talking on the cell phone part of hypermilling techniques?

04-18-2007, 12:58 PM	#6
Nautical Yaris S 1.5L of FURY! Drives: 2007 Yaris S Sedan, 5 speed Join Date: Mar 2007 Location: Central Cali Posts: 13	personally, i wouldn't put my tires past 45psi. especially since I live in the valley where the temperature gets to 114+ degrees all summer long.

08-05-2007, 01:28 PM	#7
marcus toyota View User's Garage Drives: 2007 Yaris RS Blazed Join Date: Oct 2006 Location: toronto, canada Posts: 3,637	i got front tires on 44psi and back tires on 40 psi .. thats if the air pump pressure meter really is accurate..

08-09-2007, 10:47 PM	#8
TLyttle Drives: 07 Yaris sedan Join Date: Jun 2007 Location: Keremeos BC Posts: 986	Yeah, me, too. In the old days, radials got better mileage at high pressures (smaller contact patch), better traction at lower pressures (larger contact patch). I cannot assume that the logic of this has disappeared, but I have seen no major changes in tire technology that would challenge it. I used to dump my Michelins down to as low as 15lbs for heavy snow conditions, and went where no snow tire would go! The smaller contact patch, however, generates less heat, so it is possible that lower pressure only benefits the tire companies. I also found that higher pressures had more sidewall stability ("creep"), and gave more precise steering. But that's just my experience; I was running radials before they were even legal in some states!

08-10-2007, 02:07 AM	#9
reznunt Hi! View User's Garage Drives: EF Sedan Join Date: Jun 2007 Location: Socal Posts: 434	damn 60 psi, it must feel like you're driving a damn tank to work.