Originally Posted by
cooker
If you want to be precise you have to count weighted revolutions.
+1. If you are going to do a roll out, you need to test it like this at the PSI you ride with.
Originally Posted by
cooker
Once you re calibrate you can check it by riding 10k (or 10 miles) according to your computer, and then mapping your route on gmap-pedometer.com to see if it actually measures 10 whatever.
This is not necessarily a good way to test it... You can't ride in a perfectly straight line, as it will be measured on a map. In addition, what lane you are in will also affect the total distance when you compare it to a map(you cover more distance to make a left turn than a right turn, etc). Even though these differences will be small, they are still going to invalidate any type of precision you want.