What is it? Did cpc course last week and ended up arguing with trainer 
He said continuous high speed ie 56 mph. I said under inflated or badly worn tyres.
It was a pass or fail module so I answered continuous high speed which I donāt think is right.
Opinions please.
I would say itās because the tyre isnāt properly inflated so it runs hot.
I would say over/under inflated, damaged side walls etc would be the main cause. All lorries travel at constant 56mph or thereabouts for extended periods.
under inflated surely-this heats the tyre up massively
Iām going to have about 20 breaks the morra and when my boss enquires why Iām
blaming you dri-diddly-iver
Need to cool my tyres down all this 56mph driving Iām doing.
How can you have a pass and fail on dcpc? Who the ā ā ā ā decides thatā¦ same numpty that makes these dolly questions?
Your DCPC trainer was an idiot. That is all.
They are chuffinā well built to run at a constant 56.
Most common cause is a stupid question when attached to any statement. The answer is invariably a multitude of little things that result in the big eventā¦ Another plastic instructor dishing out āfactsā.
In this case, I would say its anything that causes the tyre to run at a higher than normal operating temperature, to cause failure. So that could be
Over inflation/Under inflation
Splits/Bulges
Debris between driven wheels
Ot of interest, how was your CPC pass/fail?
Personally I think a correctly inflated tyre in good condition will be able to travel at 56mph for hours without a problem, even in parts of southern Europe in the summer.
But if there is there is a problem with the tyre, the longer itās working hard the more likely it is to fail.
Pre existing impact damage compromising strength or excessive heat caused by inflation or over loading issues.But doubtful that road surface temperatures would often get high enough here for sustained running at 56 or even higher to make any difference.
Also I would say that overloaded tyres/axles are another culprit.
My cpc was a pass 100% even though in my opinion I answered the above question wrong 
he was adamant that it was constant high speed
This is not the first time either with cpc rubbish, Iāve had countless regarding 15 min break before 6 hrs needs looking at severely if you ask me!
Surely theyāre built for doing 56mph on motorways for a long time?
As everyoneās said, Iād say under/over inflation or cuts & bulges.
Also, retreaded tyres as I found out earlier this year have a tendency to explode.
dri-diddly-iver:
My cpc was a pass 100% even though in my opinion I answered the above question wrongThis is not the first time either with cpc rubbish, Iāve had countless regarding 15 min break before 6 hrs
So if itās constant high speed, what if the roads wet? Does it not help cool your tyres?
dri-diddly-iver:
What is it? Did cpc course last week and ended up arguing with trainerHe said continuous high speed ie 56 mph. I said under inflated or badly worn tyres.
It was a pass or fail module so I answered continuous high speed which I donāt think is right.
Opinions please.
Pass or fail moduleā ā ?
Which kind of CPC was it?
Why do mobile cranes stop at regular periods to cool the tyres down?
Judehamish:
Why do mobile cranes stop at regular periods to cool the tyres down?
Axle and Gross weight ?.IE those things are bleedin heavy. 
i dont think he was on regal king size during the smoke break 
Hammy747:
So if itās constant high speed, what if the roads wet? Does it not help cool your tyres?
Probably not running at 36 t gross at 65 mph + at midday in June and July in Florida. 
Carryfast:
Hammy747:
So if itās constant high speed, what if the roads wet? Does it not help cool your tyres?Probably not running at 36 t gross at 65 mph + at midday in June and July in Florida.
But weāre talking England, it rains every day here!
As far as I was aware CPC was attendance and participation only now so you canāt fail as long as you chime in once in a while and look awake!
Never heard of pass or fail though!