"Andy Burns" wrote in message
...
On 28/06/2018 22:28, T i m wrote:

dennis quite clearly stated the scenario with a twin wheel lorry where
the 'effective circumferences' can become substantially different if
one tyre becomes deflated

Aren't twin lorry tyres linked by a pipe between the tyres? So they're
inflated as one?

The inner one usually just has a much longer filler pipe so it can be
pumped up from outside the outer wheel, and that is from a mate of mine
that drives them for a living and you can check that by looking at them.