Ever wondered when a cut in a tyre will be considered an MOT failure?

If the cord is visible then it is automatically a fail for the MOT. If, however, the cord is not visible then it depends how big the cut is. If it is less than 25mm long or 10% of the section width – whichever is greater – then it should be a pass or an advisory. If it is longer than this the cut will need to be opened up with a blunt instrument to see if a cord is visible inside (not felt, but actually visible) then it will fail.