"T i m" wrote in message
...
On Sat, 30 Jun 2018 13:15:45 +1000, "Jeff" wrote:

snip

Watching TNP going from denying that the circumference changes

He actually said originally that it changes by less than 1% and it turns
out that he was correct about that

But he also said in his OP:

"Does a tyre change its CIRCUMFERENCE when under inflated?

Answer. not by very much, if at all.

This seems to be a perpetual urban myth."

'If at all' and *a perpetual urban myth* that is making millions of
iTPMS systems work every day (as he finally comes to accept)?

However, because he is a tortured mind, he went on to say:

"It tyre pressure sensors are using this, it has to be a very very
complicated bit of software to detect - say - less than 1% change in
RPM relative to the other wheels."

He then spent the rest of the thread denying the concept of terms like
'rolling radius' when it was patently obvious to everyone who
understood how a tyres 'effective circumference' was less than it's
unloaded one so there must also be a 'loaded radius' that went with
that. Except he's a left brainer so he can't grasp things he can't
actually measure with a rule (but could easily calculate).

Are you looking to become one of his pet goblins, like Streater?

and it is now clear that the distance
between the axle and the road changes by much more than that,

Doh ... who said it didn't? Stop press, if you reduce the pressure in
a loaded tyre, the distance between the axle and the road drops!!! Who
would have thought eh?

3 times
more in fact, at least with that particular car and those tyre pressures.

Quite ... you can't draw any real conclusion re the actual distance
till you know all the other factors (like tirewall stiffness, pressure
drop and overall load etc).

If Turnip accepted how and why iTPMS systems worked, why did he post a
question about it

He didn't, someone else asked how it works.

(and argue the accepted facts of many throughout
it)?

He didn't do that either.