I'm 6'3", 300lbs, size 14 shoe, and long-ish arms (around 6'11" wingspan). I have two Radrover 4" fat tire ebike since 2016 with +4000 miles each ebike. I had to add a 400mm suspension seatpost, 0-60 degree adjustable handlebar stem, upgrade to TRP Spyre brakes, and larger pedals for both ebikes. Not the same amount of choices at +6'3" and +300lbs for a replacement ebike compared to 5'9" and 170lbs. Leaning towards upgrading to a Himiway Cobra Pro 1000w mid-drive with a 400lbs capacity with the option with the longer seatpost, larger pedals, and raising the handlebars.