Joined: Jan 2009
Posts: 44,231
Likes: 6,489
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
How different were the readings? My wife started using a cheap wired computer on her bike. I calibrated and installed it. I did the calibration by doing a rollout test, so it might be 1 or 2% off. It agrees pretty well with my ridewithgps recordings.