
Are you ready for that raid? You may want the gear. You may be able to find a group. But you may fail if your stats aren't where they need to be. Check yourself before you make the attempt - and avoid getting lambasted in vent.
To see stats for tanking Naxx, EoE and Uld, refer to
Are You Ready to Tank That Yet? For all other Wrath instances, keep reading:
Crusaders' Coliseum, located in the northeast area of Icecrown, can be found at the center of the Argent Tournament Grounds. Tier 9 items drop here.
Trial of the Crusader (ToC): Five encounters playable on 10- and 25-man versions. To tank this, you'll want to see yourself sitting at 36k health at least (unbuffed). Many groups use 3-4 healers for this raid, so survivability is key here. Be sparing with your healing potions and spells and hold out as long as you can to succeed. A high dodge rating (35%+) can help bears avoid some of those blows.
Trial of the Grand Crusader: Hard mode. To successfully tank this, you'll want to have a great understanding of the fights and something very close to 40k health.
Onyxia's Lair is in Dustwallow Marsh, a single-boss fight that was upgraded in a Wrath of the Lich King patch. This instance is playable on 10- and 25-man settings. If you can tank ToC, you should have no problems in Onyxia's Lair.
Upcoming in next patch:
Icecrown Citadel will be found in Icecrown when it's finally released. This will be the end-game Wrath raid and the place where every tank wants to go. Though this raid is still a bit unknown, it's safe to assume that bears will want to get as close to 40/40 (40k HP, 40% dodge) as possible to tank it successfully - anything in excess of this amount will only help.