Why higher pressures at high speed in tyres?
Discussion
Just wondering why my car manual states higher tyre pressures for hight speed driving?
On track days etc when the tyres work hard, you usually start a bit lower to compensate
for when the tyres warm up and pressure rises.
I would have thought the same applied to long haul motorway work, but my car asks for much higher
pressures when going fast. Do they not get over pressured after a while?
On track days etc when the tyres work hard, you usually start a bit lower to compensate
for when the tyres warm up and pressure rises.
I would have thought the same applied to long haul motorway work, but my car asks for much higher
pressures when going fast. Do they not get over pressured after a while?
Going in a straight line at speed doesn't actually heat the tyres too much - on track days it's going round the corners that makes them hot.
The real answer seems to be a bit more complicated.
http://www.tirerack.com/tires/tiretech/techpage.js...
Essentially the higher pressure is to reduce the high frequency stresses in the tyres, to reduce the risk of a blowout.
The real answer seems to be a bit more complicated.
http://www.tirerack.com/tires/tiretech/techpage.js...
Essentially the higher pressure is to reduce the high frequency stresses in the tyres, to reduce the risk of a blowout.
eldar said:
Higher pressure equals 'stiffer' sidewalls, which flex slightly less and this reduces friction which results in less heat being generated. The tyres reach operating temp quicker and more predictably and are less likely to overheat over a long journey.
Sorry, if they flex less, which generates less heat... Then how do they reach temperature faster? Only asking.. Agree about the overheating thing though.
it should have read 'stable operating temp. quicker'
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