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Derailleur in spokes
On Tuesday, June 7, 2011 3:21:25 AM UTC-4, Chalo wrote:
There is a simple, lightweight, reliable and inexpensive device that prevents just this sort of failure. It's called a spoke protector, and it works. It's cheaper than buying a new bike frame (or replacement dropout) and sundry parts every so often. I know who among my customers is most likely to need one. But a good rule of thumb is, if you suspect you need one, you do. If you have no idea whether or not you need one, you do. And if you aren't clear about what a spoke protector is for, you need one. The spoke protector has been unduly maligned. It is to chronic or occasional obliviousness what fenders are to rain. And everyone is at least occasionally oblivious. Chalo In my case, I don't think a spoke protector would have made a difference. The problem was not a maladjusted limit screw. I believe it was the pulley cage that went into the spokes. I would have needed a spoke protector that was more than half the diameter of the wheel. Ken |
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#2
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Derailleur in spokes
Ken wrote:
Chalo wrote: There is a simple, lightweight, reliable and inexpensive device that prevents just this sort of failure. *It's called a spoke protector, and it works. *It's cheaper than buying a new bike frame (or replacement dropout) and sundry parts every so often. In my case, I don't think a spoke protector would have made a difference. *The problem was not a maladjusted limit screw. *I believe it was the pulley cage that went into the spokes. *I would have needed a spoke protector that was more than half the diameter of the wheel. * Most of the good sized spoke protectors I deal with at work keep the derailleur cage from making contact with the spokes. Some of them let me know this by making a scraping sound when I shift the bike into low gear on the stand. I reckon a few of these bikes have must have had limit screw problems ever since they were new, decades ago. I even installed a minimal plastic ring spoke protector the other day that _only_ deflected the derailleur cage, not the chain if it were to fall off the inside of the cluster. That seems like a bad idea, but surely better than nothing. For some customers (chiefly pedicabbers), I will modify a big old metal spoke protector and fit it to their cassette-hubbed wheels with zip ties at the spoke crossings. This even provides some defense against a cabbie who just keeps stomping instead of stopping to investigate a strange noise when climbing a grade with passengers. Chalo |
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