My daughter has just bought a 64 plate Vauxhall Astra 1.6 SRi auto with 215 / 50 R 17 tyres. She has just had it professionally valeted, and as the guy had some time left, he checked the tyre pressures.
I set them to 32 PSI which is the figure on the door post (and the KwikFit web site). The valeter said that figure is only for the original factory tyres and for replacements, you should set them near to the maximum pressure printed on the actual tyres. The max figure on them is 55 PSI, so he inflated them to 44 PSI and told her that was correct.
I am having trouble convincing her that overinflating the tyres that much will result in a much smaller contact area and is dangerous, but she recons he must know what he is talking about and is ignoring me.
I set them to 32 PSI which is the figure on the door post (and the KwikFit web site). The valeter said that figure is only for the original factory tyres and for replacements, you should set them near to the maximum pressure printed on the actual tyres. The max figure on them is 55 PSI, so he inflated them to 44 PSI and told her that was correct.
I am having trouble convincing her that overinflating the tyres that much will result in a much smaller contact area and is dangerous, but she recons he must know what he is talking about and is ignoring me.