Bears make an excellent mount for exploring caves. If you can get about 3 high level ones you and other tribemates can explore through most caves with ease. And if you were to get in trouble these bears can run at high speeds so you can escape most predators.
The Dire Bear is the most versatile mount in the game as they are small enough to fit in all caves. Their alt attack is also above that of a Rex, and with their sprint being comparable to a gallimus nothing will get away.
With such a low breed timer and they're alternate swing being the same damage as a Rex they make ideal breeding and are great for meat runs very fast and have huge carry weights. A very good tame one of the best in my opinion
While breeding this creature is not as difficult as others, There's an easier way to do it. When it is born I advise you feed it raw meat until it hits juvenile stage, after that point fill up troughs and the bears inventory with mixed berries, since this creature is an omnivore it can eat berries. Using berries until it is fully adult will ensure that it's food source does not spoil as quickly as raw meat can. Good Luck!
The most risk free and effective taming method is to
1. Build a taming pen
2. Lure or drop him in
3. Build a bed and storage chest next to it
4. Tranq the bear until he starts to show blood
5. Put your inventory in chest
6. Let the bear kill and eat you.
8. Respawn in bed, get inventory and finish tranqing. No need to switch to a bow or use traps.
This is very effective because the bear will regenerate a lot of health from eating you. And you will have no risk knocking it out. If you do this correct, maybe even kill yourself twice, you can get the bear to be at 80-100% health when you knock it out. Thus increasing chances of it surviving it someone/something hits it.