Logic of overinflation of tyres on long trip

[RadX]

AS u all noe, on my way up north.

 

One Qn, what is the logic behind overinflation of the tyres before a long trip?

 

is it:

 

1. Prevent of high speed blowout

2. Better fuel economy at the expense of friction as the body of tyre would grip less

 

any others?

 

And Redz, hor, pay attention too liao

[Virus]

Has more air to leak, thus longer time until tire flat.

[Soya]

less friction hence less heat buildup leading to less rubber fatigue.

[RadX]

Very logical ans...tks...

 

So I guess for 16", 240kPa shld suffice??

[Soya]

depends on the car and how fast u wanna go. for mine, the manual recommends 36psi for >160kmh. for S60R, it's 39psi.

[RadX]

Thus for cannon-bull run of above 200km/h shld be 34psi for mine la

[Soya]

i tink 200kmh u better go for at least 36-38psi. that'll be abt right for track use later too.

[Ace_t]

would over inflation compromise safety at such higher speeds ?

 

eg: tyre blowout or lesser road holding on wet roads

[Soya]

most tyres can be pumped up to 50psi without unseating the beads so i reckon the safety margin is there. it's better for the car to ride a little firmer at high speeds.

[RadX]

dun do anything foolish la....such as drifting or activating ABS shiok shiok along the way..

[RadX]

Yeah, and I guess, 38psi shud suffice for the properror...

[Raycsk]

Tyres will not leak if the rim and tyre fitment is good. Tyres lose pressure due to temp variation, faulty valve or tiny puntures on the rubber.

 

When driven tyres heat up and hence the air in the tyre expands.

 

So its best to fill to recommended pressures when the tyres are cool before the long trip.

 

Depending on the extend of the over inflation you might lose optimum contact to the road surface thus increasing the risk of losing grip should you need to make sudden movements with the car.

 

Over flation generally reduces rolling resistance which I feel best for stop go traffic. Maybe not such a good idea for highway or fast driving.

[Ace_t]

hehe.. my car not capable of drifting nor employing ABS.

 

I just drive safely and stick to speed limits

[Linus]

stick to speed limits ?

[Ace_t]

that's more than double the standard pressure.

 

woun't the tyre burst or at least unseat from the rims...

[RadX]

think his 'speed limits' is relative....

 

relative to Autobahn, he is within limits

[Ace_t]

yes.. stick to the speed limit of the one in front

[RadX]

Tyres are able to withstand more than that....