I am 210 pounds and I usually ride carrying two batteries in my bag, that's about 12 pounds.
I broke the stock rear wheel and my shop built me a new set which now have 25,000 miles on them.
They work great and I run Tannus Armor to eliminate flats.
https://tannusamerica.com/collections/tannus-airless-tires-tannus-armour/products/tannus-armour
Hey Luv2ride - i pinged you on Strava but thought i'd ask here as well... what size tubes are you running with your tannus armor? The tire size that I'm running is 27.5 x 2.35. It suggests 27.5 x 1.5-1.95 but I'm not even sure if that's such a thing... :-/ I'm seeing a lot of 1.8-2.5 or so but I would think that's on the larger side of the suggested tube size.