General safety requirements - Wheels, Tyres and Hubs

Objective:

To ensure that road wheels and tyres are of a suitable type and condition and that they provide the necessary load
carrying capacity, speed rating and control of the vehicle.

1. Check wheels and rims :

a) Any wheel or rim:

• is loose
• is cracked
• is buckled
• has pieces of casting missing
• has elongated stud holes
• has weld repairs not in accordance with relevant
industry practice.

b) Any wheel contacts unrelated vehicle components
at any point through its full range of travel.

c) Spindle nuts and washers are missing, cracked,
stripped or broken.

d) Spiders have cracks across a spoke, hub or web area.

e) Wheels are not compatible with hubs.

f) Excessive end-play in hubs.

g) Wheels rotate freely.

h) Leakage hubs seals.

2. Check wheel/rim fasteners :

a) Wheel nuts and bolts do not have a thread
engagement length at least equal to the thread
diameter (except where specified by the vehicle
manufacturer), or the fitting of the wheel nut does
not match the taper of the wheel stud hole.

b) Check that any hub shouldn't missing, cracked, stripped or broken wheel mounting nuts, studs or bolts.

c) Spacer plates are used between hub and wheels,
except where fitted by the vehicle manufacturer.

d) Any item that is fitted to the tyre, rim or wheel (other than tyre pressure monitoring or inflation) which is not technically essential to the vehicle, protrudes from any part of the vehicle so that it is likely to increase the risk of bodily injury to any person.

3. Check retaining rings :

a) Lock or side rings shouldn't be incorrectly seated, sprung,
mismatched, bent, broken or cracked.

4. Check tyres :

a) Check tyre air inflation at frequent intervals or in every trips.

b) Tires (including sideways) should not have deep cuts, chunning, Bumps, protrusions, exposed cords or other signs of Body failure.

c) Check tyre wear pattern in every trip, and go for wheel alignment diagnosis,if uneven or more tyre wear seen. 

d) The vehicle should be fitted with a OEM front wheel (i.e. rim and tyre) or recommended with OEM standards.

e)Any tyre should be of a type constructed for unrestricted road use.

f) The speed rating of all tyres should be of at least 100km/h or the vehicle’s top speed, whichever is the lesser, unless a lower rating has been specified by the manufacturer.

g) The tyres on an axle should have same carcass construction (e.g. cross ply, radial ply or bias belted).

h) Dual tires should not contact each other.

i) notice that Any tyre on a vehicle should not contact the body, chassis, frame, braking, steering and suspension components at any point through its full range of travel.

j) Tyres should always be compatible with the rim to which they are fitted.

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