If the numbers are outer diameter, then the inner diameter must be about two-thirds for these large arbor reels, or about 2.5 inches? They call this the ultimate big game reel, so I have no idea how big these beasts are.

Regardless, I think we can all agree that if Orvis tests the reel for 16,000 RPM, then it will handle a permit. A carp, however, is another story, and Orvis is wise to avoid any claims with regard to this fish.