I am about 215 lbs. and don't go ultralight. Sounds like I should work for the postal service cuz I have ridden hundreds of miles of dirt/gravel/rock roads with rear panniers on the stock Alex Adventurer 700c wheels that came with my '11 LHT. Some of those miles have been jar-your-fillings-loose miles. Planning to ride at least another 80 in Montana in June. Haven't broken a spoke yet. In fact, I think the wheel has only been trued once or twice.