I agree, it may as well not be. Just preferred to ask experiences of the folks around here what is a dinifite indication of an exhausted rim. Especially with a view to riding such a long distance at once. I'm not really proficient at truing the wheels so I would rather not something like this happened en route.

Today I put a ruler to the sidewall to check how big of an indentation there is between the wall and the ruler. Well it's slight but heading for 1mm and in this situation I may be inclined to spend the 40 GBP for a rim if a third what Im going to cover in three weeks was what took me to ride a year and a half.