Carbon wheels weight limits

I started riding in late June at 262 lbs. Six months and 1,487 miles later (yes, I need one 34 mile ride between now and Sun. night to hit 1,500 for 2017), I'm down to 248.

Thinking about replacing the Fulcrum Racing 5 wheels on my 2011 Bianchi Sempre with carbon wheels. Seems that some have a...