Frazier was his best at 205, but his bodyfat percentage was still higher than Tyson's...
Tyson was 20-25 lbs heavier but came in ripped, the guy was a genetic beast when it came to muscle mass..
When Frazier came in 215 he was a fatty (no disrespect intended, just fact).....if he maintained a proper diet and good weightlifting program he could of hanged with Tyson in that department.