a larger rim size means a thicker tyre around it.a thicker tyre will definitly reduce FE to a certain extent and the indian market is really inclined to FE.thats the first thing they consider when they are out to buy a new car.so i guess thats one of the reasons and the other is about better ride with smaller rim size and higher profile.
this link shows how inclined to FE indian customers really are !!
http://www.team-bhp.com/forum/showth...highlight=Fuel (Why the heck do we care ONLY about Fuel Efficiency)
Rev