Why the difference???

[Adventurer]

Myself and Peaches both have 276C garmins, this weekend we travelled exactly the same route, if I did 500 metres more than her it was a lot, yet there is a 9 km difference between them after 680km, why?

 

[shark_za]

 

[D7]

 

[Uiltjie]

 

[Adventurer]

 

[CrazyPorra]

 

[Plothond]

 

[Runner]

 

[Adventurer]