Open Question: Baggage limitations on Asian Airlines...?

I'm planning on going to Southeast Asia this September (HK, Kuala, Singapore, Krabi & Bangkok) for a few weeks. I'm concerned a little about the baggage limitations on their planes. Taking Cathay Pacific for the most part, but will be using Tiger Airways from Singapore to Krabi and then Air Asia from Krabi to Bangkok.Do you all know the weight limitations on these airlines in regards to the check-in luggage, how many one can take and the max weight? Here in the US I believe it's like 2-3 check-in baggages at 50 Pounds max each. I'm planning on taking possibly one that will weigh about 50 pounds, and another one that may weight 10 Pounds, but will use it to put stuff that I may purchase over there, so by the end of the trip, it may weigh 20-30 pounds.I've noticed that some of the airlines offer only a 15 KILO limit. Wondering if any of you knew any info or should I just attempt to contact the airlines and see what I can get that way. Thanks in advance.