I'm a metric man. I can't think in terms of inches, but I see when it comes to chain wear for example I have no choice!
Measurement for wear is based on the end rivet offset measured at 12" (304.8mm). Less than 1/16" (1.59mm) is ok. Less than 1/8" (3.18mm) is questionable, and anything over is bad news. As you can see, no steel metric ruler is going to be graduated to those metric values. I suppose you get steel rulers that have both metric/imperial graduations, but the problem does not end there. I also see that headset sizes and other measurements seem to be quoted in inches. Am I too far in the future, or should I tool up for my own maintanence exclusively using inch-based tools? Elsewhere, technical descriptions use a hybrid of both standards and that makes it even more confusing - do I need two of this tool, two of that tool, etc - one for inches, one for metric.
Yikes! What do you guys do?
BTW. I'm 1.8m tall and weigh 89Kg! Darned proud of it too!