Originally Posted by gruppo
220 pounds is heavy and Shimano hubs have fairly soft flanges. What width tires are you running and do you check their air pressures before each ride (On the commuter wheels I recommend at least 700x28 @ 90 psi and 700x25 at 100 psi on the fast wheels)? Is the shop charging you to re-true the rims? Next time around do yourself and the shop a favor and have both wheelsets built 4X with 36 hole hubs/rims, using 14/15 spokes & brass nipples.
Oh geez... I missed the 32 hole part. A 32 hole wheel is about 30% weaker than a 36H wheel in terms of the radial loads that can cause spoke failure. And it sounds like this is off-road use, not pavement. Definitely go with 36H wheels.