Good to know.
All my equipment trailers are 6 or 8 lug.
With all the landscape companies around, maybe I can off load them easier than I thought.
Just trying to offset some cost if I pull the trigger on the 4 new 15's. Again, only reason I even thought about upgrading was to get a better load rating. I trailer everywhere and with 100lb of lead, full fuel tank, gear, etc. I'm pushing close to 7k loaded.

1820x4 = 7280 load C
2250x4 = 9000 load D

Experienced 1 blowout while towing 10k in my life time and that was enough...lol