Bicycle Mechanics - Why do my spokes keep braking
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04-20-05, 12:41 PM
I'm 6 foot, 200 pounds and ride a low end Specialized Allez. The Bike is a great ride and I put in roughlt 20-30 miles a day.
Over the last two years I've had to replace a broken spoke on muy front wheel about 4 times. I haven't hit any curbs, rocks or other obstructions. The path I ride is well maintained.
About a month ago, I had the entire wheel respoked. The Bike Shop said there was nothing wrong with the rim or hub. Yesterday, as I was riding, very suddenly 4 spokes became loose, throwing the wheel out of true. I tightened the offending spokes to limp home, but about a mile from my destination, the spokes (don't know if they were the same ones) loosened up again, throwing the wheel out of balance.
Any ideas? Should I just get a new wheel?
04-20-05, 12:47 PM
You should definately get a new wheel builder.
It sounds like the spokes were never tensioned properly.
Read Sheldon Browns site for reasons why this is critical.
04-20-05, 01:45 PM
wow yea it sounds likr tension is off by 100 pounds, sheesh. Either you have some tension balancing issues there or the wheels were of a very low tension to start. Are all of the spokes feeling rather loose? It could be that the low spoke tension is letting spokes nipples loosen.
Probably because you keep squeezing the "tube levers". - kidding (You spelled it braking- as in stopping, as opposed to "breaking". ) Just having a little fun with typos. I make them all the time.
Seriously, I would have a lbs guy look at the wheel to see what's up with spoke tension.
04-20-05, 02:09 PM
Heck if its that bad you can probably feel the tension by hand
04-20-05, 04:34 PM
The build was poorly tensioned. A good builder can straighten it up and bring it up to spec.
The old spokes breaking , I think, was due to the wheel company using 15 guage spokes, they do not fit the holes in the hub as well and this can put extra stress on the J-hook. I would also bet they were black spokes, these tend to be a little brittle.
04-21-05, 06:53 AM
As everyone else has pointed out, this wheel was not built properly. Find a wheel builder that:
1. Uses a tension meter to build wheels properly
2. Preps their spokes with wheelsmith spoke prep or the equivalent
04-21-05, 07:25 AM
In my experience spokes tend to break when the spokes tension becomes too uneven. This happens inevitably with any wheel eventually but the process is accelerated when the wheel wasn´t built well to begin with. It also doesn´t help of course if the wheel is not adjusted after being ridden for a couple of weeks and the spokes are low quality/wrong size.
When the spokes reach very different tensions then some spokes are taking disproportionately more of the strain that they were designed to and will break.
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