Fred Rafael Rednor wrote:
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.
Along those lines, the metric socket sets i own tend to jump from 15 mm. to 17 mm. Only after I bought a 16 mm did I discover how often a 5/8" works just as well. Youth may make mistakes, but I wouldn't mind having some of it back...
harvey sachs
mcLean va