Tyre Pressures Symbol (again!)

PLOUGHLIN wrote:C & U regulations on Tyre Pressures only says - CL 27 (b)

(b)the tyre is not so inflated as to make it fit for the use to which the motor vehicle or trailer is being put;

Whatever that means.

In normal English I would expect that to be unfit so no, I'm not sure what it means either.

The first part of cl 27 makes it a bit clearer.

1) Save as provided in paragraphs (2), (3) and (4), a wheeled motor vehicle or trailer a wheel of which is fitted with a pneumatic tyre shall not be used on a road, if—

Yes that makes it sensible.

However what it does mean is that you can and should change the pressure if it makes it more suitable. I don't think you could be at fault if you follow the handbook but it does allow an alternative if better.

In my case it would be easy to argue that the handbook pressure is designed to cope with the entire range of axle loads the base van would experience but over the much narrower loading we place on it there is probably a better value. I frequently see goods vehicles presumably empty being driven fast with the back end dancing over the tarmac due to the hard tyres.