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Why are average speed readings so different on group rides?

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Why are average speed readings so different on group rides?

Old 11-05-19, 12:35 PM
Seattle Forrest
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Originally Posted by Jon T View Post
Are they wireless or hard-wired units? If wireless they're "stepping" on each other and fouling up the readings.
Everybody uses GPS now.
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Old 11-05-19, 03:55 PM
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Originally Posted by Seattle Forrest View Post
Everybody uses GPS now.
You need to get out more.
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Old 11-05-19, 04:46 PM
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I'm jumping into this thread late, but the answers to the question seem pretty obvious. Group rides are not a bunch of robots riding in unison. Even if everybody starts and finishes the official ride at the same places and times, there are all these other variables: People will be riding to the ride or not, starting and stopping their head units at different times, stopping and starting at traffic lights at the different times, actually stopping at stop signs or not, pulling in to and leaving the rest stop(s) with different delays, slow pedaling versus outright stopping when there's a holdup in back (mechanical, etc.), have different autopause settings, and on and on.
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Old 11-06-19, 07:55 PM
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The group I rode with this summer solved our disparity problems with our cyclocomputers. We determined that the guy with the highest average speed must be correct and the rest of us need to work on our systems. Amazingly, no one complained.
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