Strava

If two people with Strava ride together, Strava often says you rode together. Sometimes it doesn't work, though...

If you mean can you take their record as yours, then not officially. You could download their GPX file and upload it as your own though. You'll share all their segment times, of course.

As jadias says you can copy their file using this, but it I don't think it compares the ride against your own pbs, i think it keeps the info from the person you rode w/, who created the file,

http://cosmocatalano.com/strava/export/index.html

Ah cheers.

I realised after I posted that it might cause problems with segment times (I'm too slow to care about... Although we did a ride recently where she got QOM, I was a second slower and came 272! Might change my sex to make it more interesting)...

Must have been thinking about the linking together thing that strava does. Can't be arsed moving data around.