Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Unreliable results measuring MPG / overinflation valve stem failure

Cd · 03-30-2008, 11:35 AM

Yesterday, I aired my tires up to what I thought was 50 PSI. It turns out it was closer to 65-70 PSI - but this measurement was taken after the blowout *on a ( very ) hot tire. ( Maximum inflation listed on the tire is 44 PSI )
I was in a hurry and did not check the PSI using more than one guage. I have found ( and especially yesterday ) that tire guages are horribly inaccurate sometimes.
I guess I have found my limit, because I had the blowout. Thankfully, what occured was that my valve stem developed a large leak around its' base - so there was no dramatic explosion like I always feared.
( I'm not saying that an explosion could never happen, but thankfully this time around it didn't )
The tire is fine, but needs the valve stem replaced.

* On the tires that weren't blown of coarse .

03-30-2008, 11:35 AM	#1 (permalink)
Cd Ultimate Fail Join Date: Feb 2008 Location: Austin,Texas Posts: 3,585 Thanks: 2,872 Thanked 1,121 Times in 679 Posts	Unreliable results measuring MPG / overinflation valve stem failure Yesterday, I aired my tires up to what I thought was 50 PSI. It turns out it was closer to 65-70 PSI - but this measurement was taken after the blowout on a ( very ) hot tire. ( Maximum inflation listed on the tire is 44 PSI ) I was in a hurry and did not check the PSI using more than one guage. I have found ( and especially yesterday ) that tire guages are horribly inaccurate sometimes. I guess I have found my limit, because I had the blowout. Thankfully, what occured was that my valve stem developed a large leak around its' base - so there was no dramatic explosion like I always feared. ( I'm not saying that an explosion could never happen, but thankfully this time around it didn't ) The tire is fine, but needs the valve stem replaced. On the tires that weren't blown of coarse . Last edited by Cd; 03-31-2008 at 01:25 AM..