Rakekay - I am larger-sized cyclist, and I just replaced the stock wheels on my Specialized Sequoia last week. I broke one spoke after 800 miles or so, but the wheels felt like thay had too much flex in them. I'm glad I did, and I really like the stiffness and stability of my new wheels - I guess the stock wheels just aren't up to the job!

I agree with Veronica that the LBS should have considered that - I even mentioned it to them when I first went in my concern that the bike the sturdy enough for me.

But it's great you have new ones now - much safer!