Road Cycling - 10 broken spokes

What the heck is going on? So far this year I have broken 10 spokes. Before this year I had broken only 2 or 3 in 20+ years of riding. What's stranger is that they are not breaking during braking or bumps or turning, just while going in a straight line most of the time while I'm not even pedaling. And it's always the back wheel and they break right at the hub. Any suggestions?

how much do you weigh? are you putting enough pressure on the tires?

how much do you weigh? are you putting enough pressure on the tires?
I weigh 330 pounds, yup thats right i'm fat. but I have weighed this much for 10 years, last year I didnt have a single broken spoke. As for tire pressure I always have it maxed out.

I weigh 330 pounds, yup thats right i'm fat. but I have weighed this much for 10 years, last year I didnt have a single broken spoke. As for tire pressure I always have it maxed out.

Could be metal fatigue. Probably time to have the wheel(s) rebuilt. I've gone a year or two w/o any problems and then it seems like they just start breaking for no apparent reason. I weigh 220 and eventually switched from a 16 spoke wheel to a 32 (Mavic Open Pros) with Wheelsmith spokes.

Have the wheel check for true and spoke tention once in a while. If you have never had it done, difference of the tention between the spokes maybe more than spoke can handle, specially if the rider is heavy like yourself. Often one tight spoke suffers all the stress of neighboring loose spokes. It's not an accurate way of measure but you can feel it by flexing two spoke between your thumb and another finger.

Once the first spoke break off, second one will be easier to break and third one will be even easier than the second.

330 pounds is a lot for any wheel to handle- you really need a good wheel with lots of spokes (preferably 36). Even with this you will eventually need to rebuild the wheel with new spokes. I weigh 220 pounds and found that my rear wheel had the same problem after a couple of years. Just rebuild the wheel with new spokes and the problem will go away for a while at least

Just remember us heaver guys need to do more matance than the lighter guys
and use good quality parts :)

You do nopt say how many miles you have on these wheels but they have obviosly outlived there useful life and should be rebuilt.