For discussion:
For those measurers still using pneumatic tires, finding out you have a slow leak after you have left the measured course is a hassle. It means you have to go back out and adjust the course. But, it also means you may not have an accurate measurement, even if you are within the tolerance factor. Due to the leak, the second measurement really wasn't accurate, based on the initial calibration.
Or, you calibrate near home, drive to a remote course, and have a flat during your measurement. What a drag.
What I am proposing is setting up a very quick calibration-check course at the measured course. I propose that, after completing a pre-calibration on a certified cal course, we calculate the clicks required for a 100 yard or 100 meter course. When arriving at the measurement course, lay down a piece of marked duct tape, and ride 100 yards or meters. At that point, place another piece of marked tape. Ride the new cal-check course at least one more time, to make sure your clicks are correct. (If you have a slow leak, it won't be apparent at this time.)
When the measurement is complete, ride the cal-check course twice more, to see that you have the same number of clicks as you had before your measurement rides, or very close to it. If so, you are good. If not, you can adjust your course while you are there. If a leak is indicated by a large variance in clicks, you would have to re-ride anyway, but you won't spend the time doing a post-cal near your home.
This is a simple process for one person to do, as opposed to setting up a taped course.
If the cal-check shows consistent clicks, would a formal post-cal be required?
Taking it a step further, if one had a flat, would it be permissible to use this cal-check course to re-calibrate? Especially, if one rode a previously-marked mile for verification?
Thoughts?
Original Post
