Tyres and MOTs
When you have an MOT the condition of your tyres will be checked. The tread depth is checked with a guage; the legal requirement is 1.6mm across the central three quarters of tread all around. This is a MINIMUM standard only and many motoring organisations recommend 3mm for a much shorter stopping distance, especially in the rain.
The tyres are checked for bulges, tears, cracks to the sidewall or any other visible damage. If the tyres are not safe, the car will fail the test to ensure they are checked properly to comply with safety rules.
The spare tyre is not checked for an MOT but if you ever need to use your spare it must be legal.
The wheels must not have any damage, distortion or cracks and should be securely attached to the vehicle with no missing wheel nuts or studs.