Originally Posted by
kbarch

That's because the main idea of Strava is to record what you do as you do it. Although manual entries are available to allow one to fill in gaps, I think that's more about indicating the continuity of ones activity than completing ones history.
Well yes... but it seems to miss the point that many of us do have a history, and have bikes that have distances they have been ridden before the advent of Strava. Note that I am talking about the bike list... and in particular, this distance issue can be helpful in tracking component wear, which is offered by Strava, too.