Better re-think that 16.5" option. They will be the same height as a 15" tube-type tire, and might be too short to work in place of a 16" tube-type. The equivalent tubeless, tapered-bead tire for a 16" is a 17.5". Those tires are available, but expensive!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!