When I was 390 plus pounds, I rode a Huffy 7 speed cruiser. As I got comfortable and started hopping curbs like when I was a kid, I started popping spokes. I went to the swap meet and brought a set of 36 spoke aluminum wheels. They served me well until I got down to about 240. Then I brought a steel hybrid (old Cannondale H400). Now I'm back to 260 and ride a Fuji Absolute 3.0. It has 32 spoke wheels off a Fuji road bike (bike fell off the car).

When I rode the Huffy, everything was replaced except the frame, handlebars, and saddle. The bike seems to fall apart. I do not know if it was because it was a Huffy or because of my weight. I never had a problem with the Cannondale but it was too big for me. So far none of the components on the Fuji have failed (about 3000 plus miles).
If I were at 390 again, I would not hesitate to ride the steel hybrid. I feel the components were sound and will hold up. At 240, I would ride anything with 32 or more spokes.