Simple Garmin GPS uploaded to Garmin Connect and from there to Strava, which I wouldn't have signed up for but required for National Bike Challenge this year. Strava is interesting, I must say.
Basically, just tracking miles for the last few years.
Got rid of those energy-sucking magnets when went to GPS last year.
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Bacchetta Giro A20, RANS V-Rex, RANS Screamer