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Old 13th May 2008, 10:25   #28 (permalink)
FuliHdi
Triple Ace
 
Join Date: 21 Nov 2007
Location: Ljubljana
Posts: 232
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Car: Fiat Ulysse 2.0 JTD/HDi
Country of origin:
Slovenia

Hi,

As said I have discussed this issue with my family expert, here are the basic conclusions:

1. All 4 tyres are significant, so keep changing front & back wheels so they are worn out evenly.

2. Otherwise mount the better tyres on the front axle. Reasoning is fairly simple:

Quote:
Originally Posted by Ron807 View Post
- A car with worn front tyres will understeer, a car with bad rear tyres will oversteer (when traction limits are reached).
True.

Quote:
99% of drivers will be able to correct understeer, but oversteer... not so sure...
False. Once the car slips, 90% of the drivers will not do anything but wait till it's over, be it understeer or oversteer. 99% in case of women drivers, but they are statistically insignificantly inclined to ditching a car as men are ...

Most fatal slips occur in a curve. If the front slips outwards, 99% of the drivers will end in the ditch. The remaing 1% will apply parallel moderate brake+accelaration with limited additional steering to remain on the road. In case the back slips, with no driver reaction, many drivers will end in the ditch, but you still have a fair chance of remaining on the road after a 180 or 360 degree turn.

Quote:
During hard braking the rear tyres keep the car on track, try it on a bike to brake hard with only the front brake. You will only have little control over the bike... .
True. But compare a front tyre slip to back tyre slip on a bike ...

Quote:
Originally Posted by Colin
However, when I am on a wet road at high speed I often wonder whether the excellent ABS would be even better if I had more tyre tread depth on the front in an emergency.
Correct.


Rgds Bor
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