Update: Sept 2010. Since we
wrote this report, it appears that things have
improved with regard to run flat tyre repairs.
Both Bridgestone and Michelin have stated that
their RFT's can be repaired if the tyre is not
damaged, just like a standard tyre.
Here are links for both Bridgestone
and Michelin,
where they make a statement about RFT repairs.
Armed with this information, motorists should
have no problem convincing a tyre fitter to repair
their run flat puncture. A problem you have now
is finding a place that is equipped to do the
job.
ATS
Euromaster is one place that should have the
equipment to do this repair. Please read the following
statement first though -
'The run flat repair process involves checking
with the customer to ascertain how long the tyre
has been in a deflated condition - if it has driven
over 50 miles, or exceeded 50mph, then it cannot
be repaired.'
BMW and the like give you around a 100 mile range
on a zero pressure tyre at 50mph, but don't expect
to get it repaired if you go too fast or do over
100 miles. They will check for heat build up inside
the tyre. A tyre run too fast or too long may
show balls of rubber building up on the inside.
Bridgestone Potenza RE050A - BMW Fitment
Run Flat Tyre Repair - Safe?
If you buy a brand new BMW or Audi the salesman might
have used the Run Flat Tyres (RFT) as a selling point.
It has to be said that there are many benefits in
running a car on run flat tyres. What they won't tell
you is that if you have a small puncture, instead
of a £15 or £20 repair bill you could
be looking at a bill for £200 to buy a new tyre.
The fact is that in the UK at least tyre fitters will
not repair a run flat tyre. What makes things
worse is if you suffered a puncture with a conventional
tyre that could not be repaired the bill could be
just half that at £100. So you're paying almost
twice as much for the RFT and if you happen to run
over the tiniest of nails you'll need to buy a whole
new tyre.
Why can't Run Flat Tyres be repaired?
The reason behind this, given by the tyre manufacturers
is to do with the thickness of the RFT sidewalls.
With a conventional tyre when a technician carries
out a puncture repair, one of the first things they
will do is to check the tyre for damage, especially
damage to the sidewall. This damage is easy to spot
as it shows up as creases in the sidewall when the
tyre is deflated. With the RFT it is impossible to
say for sure if the sidewall has been damaged as the
sidewall is so much thicker. Therefore they have no
option but to replace the tyre.
What about a slow puncture?
The damage to the sidewall could occur if you continued
to drive on the flat tyre for more than the recommended
distance (approx. 100 miles) or over the maximum speed
of 50 mph. However what if you'd not driven the tyre
at zero pressure, what if the car had been sat on
your driveway for a few days and happened to deflate
as a result of a slow puncture. Surely this tyre would
be repairable? Despite there being no damage to the
sidewall you won't find anyone that will repair this
RFT tyre, the fact is they only have your word that
the tyre had not been driven on at zero pressure and
they could run into liability problems if the repaired
tyre failed.
Verdict
So are Run Flat Tyres safe to repair? In theory
yes they are, as long as they are not driven on. However
as cars running on RFT don't have a spare wheel, unless
the tyre went down whilst the vehicle was parked,
this would be impractical. In practice you won't find
anyone that will repair a RFT because both
legally and financially it doesn't make sense for
tyre centers to repair Run Flat Tyres.
So what about the future, will tyre manufacturers
create a machine to check Run Flat Tyres for damage
before repair? I wouldn't hold your breath on that
one! The best thing you can do to save some money
at least, is to avoid buying from your local tyre
center and buy cheap tyres
online.
Read this article to see the pros and cons of changing
run flat tyres to conventional tyres
Article Keywords: Run Flat Tyre Repair, Where to
repair run flat tyres on BMW