Why do I keep breaking spokes?

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Eric
Member
#

I have a Trek Allant 7.4, I ride it on the paved trails. I’ve had it for about 3 years. It’s in good shape. Suddenly within the last 3 months I’ve broken 4 spokes on my back wheel. The back wheel is fine. I’ve had the bike shop check it over and over again. The other spokes are fine. I’m just riding when I hear a metallic pop, and the spoke is gone.

Any idea why?

I’ve actually lost weight recently, so I’m not riding at my heaviest weight. If it was weight related I would have broken spokes over the past few years.

Can you put more stress on a spoke if you’re riding slightly underinflated tires? I’ve ridden 3x this weekend and I didn’t check my tire pressure this morning. Worst case scenario they’re running at 60-70 instead of the suggested 80-100…

any ideas would be great.


jonawebb
Participant
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Rim or disc brakes? Disc brakes put stress on the spokes since the braking force is transmitted through them to the rim.


Eric
Member
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Disc.
I read that if you break one spoke it can put stress on the other spokes and weaken them causing this to happen. Suggested getting a new wheel or rebuilding it. Mine are not super expensive so I guess I’m going the new wheel route.


Jacob McCrea
Participant
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Tire pressure has nothing to do with it. If anything the softer tires should transmit less force to the wheel and spokes. As for riding with broken spokes, you’d need a bunch of broken spokes to create a domino effect – I’m pretty sure the wheel would be wildly out of true before you got to that point. I’d have a bike shop re-lace the wheel with quality, heavy-duty spokes. It sounds like the existing ones are cheap and, like so many other metal objects subjected to stress, have fatigued.


Eric
Member
#

This is helpful. Thanks

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