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Old April 12th, 2006, 19:01   #67
frugality
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Join Date: Sep 2003
Location: Spring Lake, Michigan
Fuel Economy: 33mpg
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Originally Posted by peter pyce
Then there was another interesting piece, on a Honda Minivan, where they tested both the basic model and the high tier model together. They both had all season tires, the exact same brand and model, but the basic model had them H rated and the high tier model had them V rated. The basic H model did very well in the lift-throttle and change lane test (the one we were talking earlier in this thread) and went through at speed of 102 km/h. The V rate tire model, thought, barely passed at only 100 km/h and the tester was commenting that due to the soft suspension and specific geometry on such vehicle, the car rolls a lot more (it is a minivan!) and at that point the softer tire wall H rated tires actually help a lot more (work a lot better) than the stiffer side wall V rated tires, therefore the higher tier car could not go as fast as the lower tier counterpart.
That's very interesting. We've had a good number of threads on replacement tires here, and there has been some head-butting over whether it's O.K. to use lower-speed-rated tires or not. Often someone will say, "Even though you may not see the speeds that an 'H' rated tire is capable of, that tire will perform better overall and be safer because of the stiffer sidewall." This information seems to question whether the stiffer sidewall is necessarily safer.
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