Larger people don't need more spokes, they need wider tires with more air. That will help keep the spokes from going "twang".

I see a lot of light weights breaking spokes on 36 hole wheels unloaded, not because the wheel is not strong but because they are running 23mm tires at 120psi. There is not a lot of give on a tire like that, and it will all go into the spoke. If they ran 28mm or 32mm tires at 75-80psi their broken spoke problems would be solved.

If you were to go to a 42mm tire at 60psi, I don't think you will have to worry about your spokes much*.


*Your results may vary