Converting a standard C15 to off -oad spec.

[V500]

In an emergency, then definitely, but there's too many bikes around where what's lying around in the spares nuts and bolts tin  goes in the hole, whether correct or not.
{And that's before you get into the "I'll just run a metric tap down that tapped hole, it'll be fine" scenario}

I suspect having a technical background (or not) often forms people's attitudes to this bodgery.

[limeyrob]

Its also an age issue.  There's a generation that only know metric and se it as the future replacing those ancient history imperial threads.  Metric is the lowest common denominator, one size fits all.  I know there are metric fine and metric course but when did you last wee one?  Steel into ally casting - std thread yet again. We are working with studs with Whit into the ally and BSC on the nut, lovely engineering.