Why do some A320s have double-bogie landing gear? I believe this is actually a rare sighting, but why do some A320s such as the VT-ESD have double-bogie landing gear? Does Airbus have a specific reason for making such A320s? 



Update: Found an image in the former Indian Airlines livery,
Air India is the only carrier with that kind of landing gear in the A320 due to India's low pavement classification number back when those A320s were ordered. In other words, more tires distribute the load over a larger area.