Jeff,
I’m relatively new to the forum and late to your thread. I’m 70+, 6’-7, and ~270 lbs.
I ride a Velotric Nomad 1 750 W fat tire eBike. Velotric says it’s good for people up to 6’-9”. I found the seat post to be long enough, but I had to add a 4” (10 cm) handle bar stem extension, the limit allowed IMHO by the cabling and hoses.
The stock 26x4 tires are for off-road, and are therefore very noisy on pavement. I replaced them with 26x3.5 72 TPI Vee Tire Speedsters, which are much quieter and feature lower rolling resistance, which improves battery life.
From the factory, it’s a Class 1 or Class 2 eBike, but can be unlocked to 25 mph (40 kph).
IMHO, the stock hydraulic brakes (180mm rotors, likely not heat-treated; resin pads) are a weak point if long downhill runs are involved, as in my neighborhood and allowing for the combined weight of the bike and me. I’ve upgraded to 203mm rotors and semi-metallic pads.
In general, I like the bike!
HTH,
Jim / crewzer