Spare
tyres are not included in the inspection. However, if a defect is seen, the
vehicle presenter should be notified.
The owner should be advised of loose or missing security bolts.
Serious under-inflation of tyres is not a reason for failure. However, the tester
may decide not to conduct a brake test if tyre damage is likely, or a headlamp
test if alignment could be affected. Advise the owner.
A tyre repair may be drawn to the attention of the vehicle presenter.
Examples of unsuitable tyres:
a. side car tyres or car tyres on a solo machine (note side car outfits may be
fitted with ‘solo’ type tyres on any wheel);
b. Motocross or similar tyres, i.e. tyres where the space between tread blocks
is substantially greater than the size of the blocks themselves; which do not
have MST (multi service tyre) with an ‘E’ in a circle or an ‘e’ in a rectangle
moulded into or on to the tyre wall
c. tyres designated by their manufacture as unsuitable for road use e.g. racing
tyres or those marked ‘NHS’ or ‘NOT FOR HIGHWAY USE’ on the sidewall.
d. a tyre specifically designed for front wheel use fitted to the rear wheel;
e. a bias belted tyre fitted to the front with a cross-ply tyre fitted to the
rearwheel
f. a radial tyre fitted to the front and a cross ply or bias belted tyre fitted
to the rear wheel
On radial tyres care should be taken to distinguish between normal manufacturing
undulations in the carcass and lumps or bulges caused by structural deterioration.
Where the engine capacity is not greater than 50cc, tread depth may be less than
1mm, if the tread pattern is clearly visible around the entire circumference and
across the whole breadth of the tread.
Directional tyres these tyres must be fitted in accordance with the instructions
on the sidewall. The direction of forward rotation is indicated by an arrow, words
or both. |
1. Examine the
tyres for type and suitability. (see information column)
2. With the wheels raised clear of the ground, rotate each slowly and examine
each tyre for:
a. cuts, lumps, bulges, tears or exposure of the ply or cord, separation of the
tread
b. incorrect seating in the wheel rim
c. valve condition and alignment
d. recutting of the tread
e. fitment in the correct direction of rotation
3. Check that there is a visible tread pattern around the complete circumference
of the tyre. Ensure that the tread depth meets the requirements using a depth
gauge
4. Check for signs of fouling of tyres on other components.
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1. An unsuitable
tyre. (see information column )
2.
a. (i) A tyre has a cut longer than 25mm or 10% of the section width of the tyre,
whichever is the greatest, and deep enough to reach the ply or cord.
(ii) A tyre with a lump, bulge or tear caused by separation or partial failure
of its structure, including lifting of the tread. (see information column).
(iii) Any ply or cord exposed
b. a tyre not correctly seated in the wheel rim
c. a seriously damaged or misaligned valve stem which could cause sudden deflation
of the tyre
d. a tyre with a recut tread
e. A tyre not fitted in accordance with the direction of rotation marked on the
sidewall (see information column).
3.
(i) the tread pattern is not clearly visible over the whole tread area. (see information
column)
(ii) The depth of tread is not at least 1 mm throughout a continuous circumferential
band measuring at least three quarters of the breadth of the tread. (see information
column).
4. A tyre fouling another component.
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