Regardless of height, 220#s is heavy for a rider of competition type equipment. Some wheels have suggested rider weight limits, so you might go to Mavic's site and see what they have to say about weight.
If 220#s is above the limit Mavic spec'd, it brings up another question. Why would a bike company spec them on a large frame bike without considering or informing buyers of the limit? And why would a conscientious dealer sell it to a customer knowing he's big, and might be heavy?
Understand that I'm not saying the wheels are defective, after all things happen to wheels. What I am saying is that maybe somewhere along the line someone might have dropped the ball and sold you equipment that wasn't well suited to your needs.
It's like walking into a car delaership, and telling them you have a large property and often have to move large quantities of soil, mulch or pavers, and they say "OK" and sell you a sports car instead of a light truck.
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