[QUOTE=Mark G;683312]Just remember the little mechanical bike distance recorders with a little cog wheel on the end that clipped to your forks with a little spike on your spokes that hit the cog on every revolution? Click, click, click, click....
Or in some cases click.........click......
click...

Yep. Told you all you really needed to know...and even allowing for inflation they didn't cost upwards of £500.