My wife and I decided to take the tandem route to cycling equalization 11 years ago. Works well for us - most of our riding-together miles (600 so far this year) are with her sitting right behind me. We like it so much we moved on up from our starter tandem (KHS) to a recumbent tandem (RANS) this year.
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Bacchetta Giro A20, RANS V-Rex, RANS Screamer