Can Thu

Bait-casting Reels has a history that has developed for using large Mouth Bass fishing in U.S.A. and Japan. So there so many model which is very weak to salt water.

The max drag for big reels is mainly decided by the diameter of spool.
The bigger the diameter of spool will be, the weaker the maw drag will be.
The diameter of 30000 is much bigger that 8000.
So The max drag of 30000 (20kg) is weaker than 8000 (28kg).