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Tire pressures play a big factor in accidents

A government study performed in the United States has found that 5% of vehicles involved in crashes experienced some sort of tire problem. The moral of the study is that underinflated tires are at significantly higher risk of causing an accident. The National Highway Traffic Safety Administration -- using data gathered between 2005 and 2007 -- conducted the study.
 
According to the study, vehicles with tires underinflated by 25% or more were three times as likely to be involved in the crash linked to tire problems. The study also found that 66% of tire related crashes involve passenger cars.
 
"Tire problems are inherently hazardous to vehicle safety," the NHTSA report said. "When these problems emerge in the pre-crash phase, the time window for attempting a crash avoidance maneuver is normally very small."
 
Another discovery made in the study includes that poorly maintained tires are tires that are underinflated are also more likely to experience problems in bad weather.
 
Of the sample vehicles that the study looked at it was determined that 11.2% had problems linked to tires in bad weather compared to 3.9% when weather was not a factor. Senior vice president for public affairs cites the new tire study for the Rubber Manufacturers Association, Dan Zielinski, as a clear indication that proper tire maintenance and inflation are critical for driver safety.
 
Tire pressure monitoring systems are installed in all 2008 model year and newer vehicles due to a U.S. government mandate. The tire pressure monitoring system alerts drivers when any tire is 25% or more below the recommended inflation level.

Source: Detroit News



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RE: car vs tire manufacturers
By talikarni on 5/28/2012 6:18:12 PM , Rating: 2
one problem with that: that only applies to commercial vehicle tires, so that may be true for semi or trailer tires, for most passenger vehicles it will cause under or over inflation.

So based on your calculation, which there is a problem because there is no shown minimum inflation on most tires.

So using mine as example:
Max 44 psi at 2535 lbs., vehicle curb weight of approx 5000 lbs., max load rating of 10140.
We will assume minimum 30 psi.

30 + ((44-30) x .49) = 36.86 psi which is still a shade over 1 psi low instead of recommended 38 psi for these tires (not with trailer load).

When it comes to bias ply tires such as trailer or many semi tires, the ratings are REQUIRED pressure, not "max" or "load" pressure. So if they say 50psi, then fill them to +/- 5% of required pressure. Just make sure the tire load ratings are 10-20% below full load (curb weight).


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