Re: bigger pontoons?
More flotation.
If the waterline is currently half way up the 23" tubes, your displacing about 625 gallons of water or 5213lbs.
25" tubes will displace 739 gallons or 6163lbs if the waterline is half way up.
You will be able to haul 18.22% more weight or 950lbs if the waterline is at half way up the toons. More like 850 to 900 as the bigger toons will weigh more.
