On a $50.4 million cap the maximum for a player with 7-9 years experience would be $15.12 million, but based on this from Larry Coon, these FAs can get more than that.
Players' maximum salaries are never less than 105% of their previous salary. For example, a ten-year veteran who earned $20 million in 2006-07 has a maximum salary of $22.1 million in 2007-08, even though that is above the league-wide maximum. A free agent does not need to remain with the same team in order to receive 105% of his previous salary, although the team that signs him is subject to the same salary cap restrictions as with any other free agent.
For Lebron, Wade and Bosh 105% of their previous salary ($15,779,912) would equal $16,568,907.
Now here's where I'm confused. If you have the Bird rights on a free agent, you can offer a 10.5% raise off the previous season, compared to just 8.5% if you don't have Bird rights. Does this mean CLE can offer $17,436,802 (09/10 salary * 1.105) to Lebron next year? Also what is the max another team, like the Nets or Knicks can offer? Would they be able to offer an 8.5% raise, or just a 5% raise?
Needless to say, this cap news could give CLE, MIA, TOR, etc. a huge advantage in terms of retaining their star free agents.