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Repairable?

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x5driver silver surfer
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Re: Repairable?

Post by x5driver silver surfer » Tue Nov 25, 2014 10:18 pm

Shoulder repairs should not be carried out - full stop, see my previous post  :o.
Also a tyre should NEVER be repaired without it being removed and thoroughly inspected, as without this procedure it is impossible to see if secondary damage has been caused to the interior liner of the tyre/casing.
Any such unknown hidden damage could lead to a sudden deflation at speed, with possible loss of control and dire consequences.
With a heavy vehicle such as an X5 this would be even worse.
Please do not take the risk  ::)

damian777
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Re: Repairable?

Post by damian777 » Wed Nov 26, 2014 8:57 pm

Thought you could drive after a  blow out in a RFT ? So if the repair  plug comes out, you just slow down to below 50 mph as per owners handbook and drive home, unlike  a normal tyre where loss of control is likely at speed if a tyre does blow, but not a RFT ? Isnt that  RFTs  biggest selling point  apart from space saving and weight ?
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Re: Repairable?

Post by X5Sport » Wed Nov 26, 2014 9:10 pm

That's the theory.  The sidewalls should not collapse.  What would happen in the real world I would rather not discover, though the only time I did get a .25" hole punched in a tyre there was no drama at all.  That tyre just got a bit warmer and the pressure warning went.  All fixed and still in use 4 years later.

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Last edited by X5Sport on Wed Nov 26, 2014 9:13 pm, edited 1 time in total.
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x5driver silver surfer
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Re: Repairable?

Post by x5driver silver surfer » Thu Nov 27, 2014 4:31 pm

Yes I agree regarding RFT capability. What I was concerned with was just repairing the tyre with a plug and carrying on as normal without getting the interior checked, RFT or normal tyres.
Unfortunately there can be a tendency for some drivers not to get the tyre correctly checked after the repair.
Incidentally the reason for no repairs in the shoulder area is that area, between the upper sidewall and tread rubber edge, which is where the stiffened tread bracing plies end, which is known as the Flexion or flexing zone, is, as the name suggests, where there is the most flexing of the radial / body plies takeing place. It is almost like a "hinge" when the tyre is running underinflated/deflated.
Continual running on can lead to the radial casing plies "unzipping" i.e. a rapid deflation, usually referred to as a blowout. This can still occur after a tyre has been repaired correctly if the tyre repairer does not carry out a very close inspection of the casing as the body plies can have been irreversibly weakened in the shoulder area.
RFT's of course are less likely to fail in this way, however they will still have the interior damage done to the interior lining, which is why it is imperative that the tyre is removed for a full inspection.
Having had many years of tyre technical experience and knowledge I am well aware of these issues.

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