why indian airlines has a double-bogey gear on their a320s
Because they use the A320´s to airports whos runways arent the greatest. The bogey landing gear reduces the footprint on of the aircraft, which spreads out the weight over a larger area.
do any other carriers have this?this
Nope, no other airlines have chosen this option.
PS, it is only a bogey gear. (4 wheels per MLG strut)