I'll try 24 when cold.
Nuts tight, I did have one coming loose while away but this shows up as a very different noise. Constantly checked them throughout.
It was more pronounced when wetter so I assume it is a combination of older and worn tyres in overpowering conditions, but it was unsettling robbing of confidence that was there in spades in the dry.
Michelin PSS were on the list.
Not sure what position 24 is, but I have also found that the colder it is the tighter the nuts get
