Joined: Jan 2009
Posts: 44,171
Likes: 6,394
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
A car GPS will tell you how far it is from HERE to point B. With a bike GPS, you hit the start button, and it records everywhere you've been as well as how long you went, how fast you went, graph speed over time, and graph elevation over time. I'll post some of my rides later today.