The DUO2/3 Stroller Seat is longer and deeper than the original DUO Stroller Seat.

It is compatible with both the original DUO Stroller frame and original DUO Double Adaptors, however due to the shorter DUO frame and larger DUO2/3 seat, configurations will be limited.

please see below for configurations using the original duo frame and original duo double adaptors

NOTE: No other configurations are possible and the DUO2/3 Double Adaptors can not be used on the original DUO frame.