> Oh good, its not just ME! I was beginning to wonder
> tho - seemed kind of odd that a 13mm was slightly loose.
Strangely enough, I think you'll find a fair number of "13mm"
nuts and bolt heads are better fit by a 1/2" wrench. I would
especially recommend trying the smaller 1/2" wrench on French
bolts which always strike me as having been made from softer
steel that Italian ones.
Conversely, I've worked on a few bikes made to Imperial
and/or American dimensions whose "9/16 inch" bolt heads were
better fit by a 14mm wrench. It even made me wonder who was
supplying fasteners for older American made Schwinns, for
example.
Best regards,
Fred Rednor - Arlington, Virginia