35A-11
WHEELS AND TYRES
Tyre: Repair
35A
Perforation
There are two types of perforation:
- single perforation: perforation caused by nail etc. not
requiring a reinforced tyre boot and which can be re-
paired when the tyres are cold,
- damage: rubber detachment etc. requiring repair and
reinforcement of damaged plies.
This repair method only covers single perforations.
Tyre areas
Areas which cannot be repaired:
- tyre bead (1) ,
- shoulder (3) .
Areas which can be repaired:
- sidewall (2) ,
- crown (4) .
Perforation table *
LV: Light Vehicle
LCV: Light Commercial Vehicle
HGV: Heavy Goods Vehicle
* If the diameter of the puncture is greater than these
figures, replace the tyre.
The tyre cannot be repaired if:
-a compulsory marking has been worn away (see 35A,
Wheels and tyres, Tyres: Identification, page 35A-
8) ,
- the interior of the tyre shows signs of under-inflation
or overloading,
- the rubber shows signs of chemical damage (hydro-
carbons and other corrosive substances),
-incorrect and irreversible repairs have previously
been made to the tyre,
- the carcass has been damaged,
- cuts or circumferential wear (cracks) are visible on the
interior or exterior of the tyre,
- the tyre bead has been damaged (ply visible),
- the tyre's bead wires are visible, damaged or de-
formed,
-the tyre shows an irregular wear pattern which may
impair vehicle handling,
- the repair requires two tyre boots to be overlapped,
- the manufacturer has expressly prohibited any re-
pairs, in writing,
- there is damage to the shoulder area (junction be-
tween the sidewall and the crown),
- the angle of the perforation channel (hole) is greater
than 15˚.
123449
Area
Crown: max
Ø in mm
Sidewall:
max Ø in
mm
LV speed rating
less than or equal
to T
63
LV speed rating
greater than or
equal to H
60
LCV load index less
than or equal to
121
63
HGV load index
122 to 177 (inc.)
10 3
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