View single post by Stealth
 Posted: Mon Nov 1st, 2021 10:45 am
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Joined: Wed Oct 31st, 2007
Location: Back To Reality, United Kingdom
Posts: 1573
Copy & paste from the MOT Manual, which may help clarify the question ...

The following criteria should be used when assessing a cut in a tyre:

any ply or cord that can be seen without touching the tyre - fail

if by folding back rubber or opening a cut with a blunt instrument, so as not to cause further damage, exposed ply or cord can be seen irrespective of the size of the cut - fail

if a cut which is more than 25mm or 10% of the section width whichever is the greater, is opened with a blunt instrument and cords can be felt but not seen - fail

Before failing a cut, you must make sure it’s the cords that you can feel not a foreign object. If you’re not sure, then you should pass and advise.

Dificult to give a definitive answer based on a photo of the cut in question, but if ply or cord could/can be seen when the cut is opened as described above, then the size of the cut is irrelevant & the tyre would fail.