Across 25 branches
Family run business
50+ top brands in stock
FREE Delivery Mainland UK | Car Tyre Orders over £55
In the majority of cases the answer to this question is YES, but, it is not as straight forward as you would like to think. Some tyre manufacturers have said you can repair their run flat tyres, though there are guidlines & stipulations to adhere too, while others just say you can't.
In cases where manufacturers do not recomend the repair of run flat tyres and a repair is carried out, the manufacturers warranty will no longer be valid.
In this article we answer the following questions:
Can you fix a run flat tyre with a nail in it?
Nail in the tyre, leave or remove?
Can Bridgestone run flat tyres be
repaired?
Can Continental run flat tyres be repaired?
Can Dunlop run flats tyres be repaired?
Can Goodyear run flat tyres be
repaired?
Can Hankook run flat tyres be repaired?
Can Michelin ZP tyres be repaired?
Can Pirelli run flats be repaired?
How do I identify run flat tyres?
How long does a puncture repair last?
How far can you drive on a run flat tyre?
Can you put tyre weld in a run flat tyre?
Bridgestone
A repair to a RunFlat Tyre is the same as any tyre being repaired under
BSAU159 G.
However in addition to the ‘normal' checks prior to repair, one should check
the inside inner liner of the tyre (around the shoulder area). If there is any
evidence of ‘creasing', ‘cracking' or deposits of rubber ‘crumb/dust', then a
repair should not be carried out as these are signs that the tyre has been
running at very low or zero pressure for an extended amount of time, therefore
using the RunFlat sidewall component up to/very close to its distance/seed
limit. (50 miles @ 50mph).
If there are none of these signs above, then it is generally ok to proceed
with the repair.
Continental:
Do
not recommend the repair of any SSR (Self Supporting Run flat) this is
because the hard inserts within the tyres sidewall can be damaged if the tyre
has been ran on in an under inflated condition. This damage is not noticeable
or visible and if a tyre is put back into service this could potentially be
extremely dangerous. Although the tyre may have lost little pressure there will
be no visible signs if this underinflation has caused the secondary damage
mentioned and for that reason we cannot recommend them for repair.
Dunlop/Goodyear:
Unless
otherwise specified in the car owner's manual, a Goodyear or Dunlop self
supporting tyre can be repaired by a qualified tyre professional after a
thorough inspection and analysis of the tyre history. In case of doubt the tyre
should not be repaired.
Note: The professional repairing the tyre is
in any case responsible for his repair work.
Goodyear or Dunlop does not support tyre repairs under following conditions:
• Repairs outside the tread area. • If the tyre sidewall area is damaged inside or outside of the tyre by a sharp object. This damage could have damaged the supporting insert and would thus substantially reduce runflat distance or otherwise reduce the tyre life. • If the tyre has been run at low or zero pressure (with warning alarm active) for a long distance or at too high speed. This can be identified through driver feedback, worn appearance of the external tyre shoulder or upper sidewall. • Innerliner damage or rough appearance. • Any damage that would make a standard tyre unrepairable.
Hankook:
Hankook run flat tyres are repairable as long as the following conditions
are met. An improper repair is unsafe and will void the limited warranty.
Runflat tyres are not repairable in the following situations; - If the tyre was
operated with inflation pressure less than 15 psi (100 kPa). - Abrasion or
other damage is present on the exterior tread, sidewall or bead areas. -
Abrasion, wrinkling, or separation is present on the tyre interior. - Any
condition or damage is present that disqualifies the repair of a conventional
tyre.
Michelin:
A Michelin ZP tyre may be repaired once and once only by a
tyre professional following the normal rules and procedures for the inspection,
preparation and repair of standard tyres. If the object in the tyre is at an
angle to the tread of less than 30degs then the tyre is NOT repairable.
ZP tyres which carry sidewall markings indicating that repairs should not be
carried out are still considered non-repairable.
Pirelli:
Pirelli run flat tyres are not repairable. Pirelli said the reason
why their tyres are not repairable is because you cannot see what damage has
been done to the tyre construction when it has been driven flat for any
distance.
How do I know if my run flat tyre is punctured?
The first
indication you have that your run flat tyre could be punctured is when your
tyre pressure monitoring system (TPMS) light comes on.
Due to the tyres construction run flat tyres are not always easy to see if they
are going flat. If your TPMS light has come on take your car to the nearest
tyre centre or garage to have the tyre examined. Do not reset the TPMS until
the tyre is at the correct pressure as this will give a false reading which
could cause an accident due to the tyre pressure being low and the vehicles
speed exceeding 50mph.
If I see a
nail in the tyre do I leave it or remove it?
If you see a nail in a tyre it is
natural to want to remove it. It is, however, better to leave the nail in the
tyre & take it to a professional tyre repairer to have it inspected.
The reason for doing this is because with a tubeless tyre the only place the
air can escape from is where the object has penetrated the tyre so by removing
the nail the hole becomes larger and the air escapes quicker.
Even if you test the tyre with soapy water & you don't see bubbles
appearing around the area of the object it doesn't mean the tyre hasn't been
damaged. The object may have not punctured the tyre but it could have gone down
to the steel bracing in the tyre which would allow water to go into the hole
and cause the tyres bracing to corrode & subsequently fail.
Are there run flat repair kits?
Repairing a run flat tyre requires a very good knowledge of a tyres construction and knowledge of what can & can't be repaired. Even if there are kits to repair run flat tyres we would recommend you don't use one yourself unless you have been professionally trained to repair a vehicle tyre.
How long does a puncture repair last?
Any repair to a tyre has to last for the lifetime of the tyre.
Puncture repair cost?
The cost of repairing a run flat tyre is usually the same as a standard tyre as the process is exactly the same. Due to the nature of a run flat tyre being more difficult to remove & replace it could, however, increase the cost of the repair.
How far can you drive on a run flat tyre?
It is generally recommended you only drive on a flat run flat tyre for 50 miles at a maximum speed on 50mph
Can you put tyre weld in a run flat tyre?
Tyre weld or tyre sealants are only a
temporary measure to allow you to drive a vehicle far enough to have the tyre
repaired or replaced.
As run flat tyres are designed to be driven when flat there is no reason to use
tyre sealants in a run flat tyre.
If you thought using a tyre sealant would help keep the air in the tyre,
allowing you to drive further, would be wrong as prolonged running of an under the
inflated tyre would cause damage to the tyre.
Add to this, all tyre sealants are designed for use as a temporary measure and
would still go down when the wheel is stationary for prolonged periods.
How do I identify run flat tyres?
All tyre manufacturers have writing or a logo on the sidewall of their tyres to indicate the tyre is a run flat tyre.
Below are the markings on the sidewall of the tyre to show you it is a run flat tyre.
Bridgestone – RFT (Run Flat Technology)
or DriveGuard
Continental – SSR (Self Supporting
Runflat)
Dunlop – DSST (Dunlop Self Supporting Technology)
Goodyear – EMT (Extended Mobility
Technology) or ROF (Run On Flat)
Hankook – HRS (Hankook Runflat System)
Michelin – ZP (Zero Pressure)
Pirelli – Run Flat