Just gotta add-

I've been using 3 pairs of bibs and 1 pair of shorts for the past 4 years, and I pretty much throw them in the spincycle dry weekly.

There is zero damage to any of them, and they all look pretty much completely intact - no frayed threads from the dryer. I thought they'd get beat up after awhile in the dryer, but no such luck - the fibers are as tight and intact as they were when I got them. Since then I've never been afraid to cycle dry any of my bike/run clothes. All of them have done great.