Join Date: Oct 2008
Location: SE USA, Appalachia
Bikes: 98 Litespeed Natchez
The bigger you are, the more you need to check whether your wheels are properly tensioned. No shop can make a completely Clyde-proof wheel, so don't automatically assume the shop did it wrong. Even a wheel that is properly trued by a shop can go out of true fairly quickly if you are big rider and ride on rough roads. Truing wheels isn't rocket science, and with a little research and reading most people can learn to do it themselves. If I were you and I rode every day, I would do a visual check every time I rode, and I would check the tension once a week or about every 500 miles or so- so in your situation it would be worth your effort to learn to DIY as opposed to running off to the shop all the time. ( It's also a good incentive to lose weight, because the less you weigh the less you'll have to check them ). You generally don't have to worry much about the front wheel, the back will have the lion's-share of the problems.
Even if you don't know how to true wheels, one can do a quick rough check on whether the spokes are evenly tensioned by plucking the spokes. If the pitch on one of them is way higher or lower than the others on the same side of the wheel, then it probably needs re-tensioned, even if the wheel looks true to the naked eye. If you leave it this way, you're almost guaranteed to break a spoke in the near future.