I have a new road bike and thus I've converted my old one into a commuter and what I hope will be a nice, fast day-tripping tour bike.
As you can see, the wheels on this bike are entry-level race wheels, Mavic Aksiums to be specific. I think the rear wheel has 24 spokes, the front has 16.
I'm 6'1, 235 lbs, and I'm planning a 4th of July ride to the beach, some 45 miles away, along paved highway and farm roads. I will be carrying at least two days worth of clothes, toiletries, locks, spare tubes, and such. I think it'll probably be 50-70 lbs total. My wife will be riding with me, but I want to carry the bulk of the load. I will have a new set of panniers by then, the bags in the photo are used for commuting.
So should I worry about collapsing or breaking my rear wheel if I put that kind of load on it? Should I buy a cheap wheel + casette with more spokes just for touring duties like this?