In reply to CurlyStevo:
> Didn't all UK grades originally come from font?
I'm sure that you're right.
> Are you saying now that sandstone grades in the 5's and 6's are still more related to font grades than UK tech grades? I can easily provide examples in the 6's where that is not the case. Also consensus with most climbers on here (search the forums) and that I speak to, is that at about UK5a and above the sandstone grades are about right.
In origin, I believe so and yes, Font and SS appear to have more in common than elsewhere. But this does not work in all instances. Just as MR is hard at 6A, it was the first one of that grade, traditional 6As/6a's, in the Forest and in Sussex, are hard for the grade. But there is equivalence elsewhere, a traditional 6A at Curbar (Smoke ont' Water start) is slightly harder than Hate (6a).
In general I'm sure that you are right that there is broad equivalence at 5a but I don't think that you will find routes graded 5c or 6a on limestone or rhyolite that would be graded similarly on SS. You'd be bloody disappointed and test your gear far more often if they were.
There's also the argument that you can break down a problem into a series of Font or V grades, which is overanalysing SS routes but might also make some sense.
Edited to say that I see GS has now spoken and has a far better understanding of the history of it all that I do.
Post edited at 09:34