Our tandem features a triple chainring setup 54/42/32 with an 11-34 9-speed cassette.
In the 'old days' (1970s) ran a TA triple 56/44/28 (with custom lengthened front der) and 14x28 5-speed freewheel on our tandem.
We are ages 78/75 and live in hilly/mountain terrain in AZ.