Test Description
Tyre condition
The reason for failure with respect to tyre wear is:
"The grooves of the tread pattern are not at least 1.6mm throughout a continuous band, comprising: the central three-quarters of the breadth of tread around the entire outer circumference of the tyre".
Tyres must be correctly matched with regard to:
- type
- size
- structure
NB. type or structure but not both.
- tyres on the same axle must be of the same structure and size.
Also examined:
- general condition of tyre
- condition of valve.
Tyres fail if they have serious cuts, bulges or other damage.
The wear on the tyre is checked with a tyre tread depth gauge to ensure  compliance.
The tyres are examined to ensure that there is no fouling with any part of the vehicle.
Notes: Although under-inflation is not in itself a reason for failure, a brake test may be inadvisable because of possible damage, and it may affect headlamp alignment. The condition of the spare tyre is not part of the MOT.
Wheel condition is a failure if:
- damaged
- distorted
- cracked
- distorted bead rim
- not securely attached to the vehicle
- wheel nuts or studs missing
An externally fitted spare wheel or spare wheel carrier must not be so insecure that it is likely to fall off. | 
Wheels and tyres