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When are Tires unsafe
The story below is making wonder if the BF Goodrich Trail tires I got as OEM with my 2000 Tundra, with only 26000 miles on them, should be replaced. The center of the tread is good but the edges have lost almost all of the outside cleats that were on them when new. I also notice if I go up steep switch backs that are wet, or the least bit sandy I lose traction even when going slow in two wheel drive. Doing a 360 in a Tundra with the family is not an image I welcome, or am I over reacting to the story below:
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My father in law got into an accident on the interstate recently in the rain on the way to my house. He hydroplaned and lost conrtol of the car at 65 mph the car did a 360 and went up an embankment hit some object with the right front fender. Blew a rear tire when he hit a curb. Spun some more and wound up in the middle lane of three facing the wrong way sideways, with cars coming at him at 70 -80 mph in the rain. He managed to start the car and get to the side of the road where he changed the flat tire.
He got to my house and when I looked at the tires on his car you could see that they had 30k miles on them and that while the tread was not bad in the middle the edges of the tires were worn somewhat.
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Dennis
Tractorpoint
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When are Tires unsafe
Yup the tires are worn on both edges so it is underinflation, plus just plain old wear.
I usually set the pressure to be 2 pounds higher than the vehicle recommendation, but the recommended pressure is only 26 front and 29 year which seems low to me.
I took some pix of the tires in my frames 7 and 8 , 8 is my original spare, hmmmm what do you think, pretty shot?
They look worse now with the comparison.
Of course the treads on pix 6 look much better that 7 or 8 ;>)
I rotate the tires, and the wheel alignment is OK so I think is just the combination of.
1)Bf Goodrich are not long wearing tires
2)Toyota set the inflationpressure low to give a smooth ride
3)Off road tires wear faster
4) 4wd causes more corner wear
I will probably replace these with michelins, I had them on a Jeep Grand Cherokee and they still looked good with 64000 while the original goodyear wranglers were wasted at 30k
Dennis
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When are Tires unsafe
Ken,
It is interesting how pieces of knowledge can come together, I have never worked at a tire dealership so I did not know that Michelins were thinner and cooler running.
Now let's add this to the mix. From 1995 to 1999 I worked for the Engineered Materials Division of Alled Signal (now Honeywell).
In 1996 I went on a business trip to Europe for Allied Signal. We visited a polymers plant that Allied had completed 2 years before my visit. The plant cost a fortune, it was huge. The purpose of the plant was to supply tire cord solely to Michelin Tire. Because of this the plant was built in an obscure area of France close to one of Michelin largest plants.
Our Allied tour guide pointed out that while the objective was to supply tire cord to Michelin, the plant while brand new and state of the art for Allied, was never able to manufacture tire cord that was #1 grade, this was an enormous failure for Allied and millions and millions were lost because of it.
The polymer cord grading had to do with cord strength / consistency if I recall correctly. Michelin only purchased first quality cord and therfore never bought any cord from Allied. Therefore they wound up having to ship it longer distances than hoped for to other tire manufacturers who had lower standards at the time.
So maybe the thinner carcas on the Michelin has something to do with higher spec that they follow.
Dennis
Tractorpoint
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When are Tires unsafe
Yup, it all depends on use. Long tread life is not always a good thing either, usually at odds with traction, handling....
I used to be an avid bicycle nut, before kids, I started using Michelins on the bike, I was not as happy with them as on cars.
Recently I have found that bicycle road tires have gone thru the roof, I guess it could be that a lot fewer people do it than eight years ago, most people seem to ride mountain bikes now, and my mountain bike tires look like they will last forever.
Plus with the extra pounds on me I seem to be blowing those 25mm road tires awfully quick.
So when are we starting the weight loss program!
Dennis
TractorPoint
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