Loose spokes after only a few rides
Unfortunately, most bikes are only rated to 300lbs or less. However, if this is a new bike, you should take it back to the shop and get them to fix it.  They can't claim they didn't know you were a heavy rider when they sold you the bike.

You might need to get more substantial wheels with more spokes. Wheels designed for touring bikes might be more appropriate. Also, when riding, you need to be careful to avoid potholes and other bumps in the road and don't go up and down kerbs. If you can't avoid a bump, lift your weight off the saddle so your legs and arms are acting as suspension&nbsp;&ndash; this applies to riders of any weight and it's more comfortable for you as well as the bike!