A: It can be removed with 4 screws but is not made to come on and off.
A: The basket is attached with 4 screws and is detachable. It is not a quick release system.
A: It says 18.5 inches under the description
A: The frame is 16.5
A: The bikes are shipped 80% assembled. Front wheel, handlebar and stem, seat, pedals all have to be installed. Also brakes and derailleurs have to be adjusted for final assembly.
A: This bike does come with a kickstand.