In general, how to assess the severity of a cut on the side of a tyre? How to tell if it safe to drive?
Note that I realise there are a few related questions, but they are asking about a particular cut (with photos) which isn't extremely useful for other people. This question is about what to look for in general when assessing the road-worthiness of a tyre with a cut.
I am about to buy a small car (ford fiesta, in the UK) and I noticed a cut of the side of one of the tyres. I did not take a photo of the cut. I want to know what to check for when I go back.
The dealer refuses to change the tyre(s) and argues that since the car passed AA inspection last week, the tyres are safe. I am still concerned as the only tyre-related item in the AA report is tread depth (4-5mm in my case) but there is no mention that they checked for cuts/bulges. Maybe I am worrying too much.