Hi all..
One point that hasnt been touched on much is the handling degradation due to over pressure.(and no , ime talking about over 60psi - not 35)
The tyre manufacturer knows the saftey limits of the carcase (tyre structure) as far as air presure is concerned , and I would guess that this is A LOT higher than what is printed on the sidewall.
I would not be worried about tyre failure from presures in the mid to high 40's at all.
I think its quite safe.
But even at these presures handling and braking probably are compromised.
When racing we use tyre pyometers to measure the temperatures of the tread at different points.
Assuming 0 degree camber and 0 toe setting a tyre that is overpresurised will show higher temps in the centre of the tread.
A racer knowing this will liklely drop the pressure to the area where the tread has equal temperature across the face.
This will be in the zone of maximum grip.(suspension setup and steering angle complicate this , but this is a simple explanation)
If tested with a pyrometer normal road tyres can show overinflation but its less of a problem (structually) for them as they (by comparison to race tyres) are not so fragile.
They are quite duarble but low performing as far as tyres go.
But really , if you notice that in the wet you are more likely to plow through a corner than turn it when using higher presures then really it is already too high.
This is easily tested and doing it in the wet simulate what its behaviour would be in the dry but at a much lower (and safer) speed.
As ive said b4 , ime all for saving gas and money , but when the line of safety gets crossed I dont see any saved value at all.
I think my safety and the saftey of my friends and strangers is more important than the few extra cents in my pocket.
My presures are around the low 40's where I feel that its a good safe compromise.
PS :theres been some good posts so far on this thread - Thanks
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