In Reply to: is 30kg the maximum you can take back posted by macsmum on Monday, 25. October 2010 at 22:23 Bali Time:
On an economy ticket, you're allowed 20kg each person. On business class and star class tickets you can have more. You should refer to your ticket to see what you're allowed, as it should be printed on there. Some airlines allow pre-purchase of excess luggage but that would depend who you're flying with.
As stormy said though, the maximum per piece of luggage is 32kg and this is OH&S law so cannot be increased, no matter how big your bag is.