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Old 07-19-07, 09:09 PM   #1
CrimsonEclipse
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Spoke failure. Time for upgrade?

I just had a spoke break on my Speed P8.

Should I simply replace the one spoke or:
a. replace all spokes with a larger gauge
b. buy all new rear wheel (I'll take suggestions for a very high strength 20" wheel)

Also, will the loss of a single spoke make the wheel dangerously weak?

CE
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Old 07-19-07, 09:31 PM   #2
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Replace the broken spoke and that's it. A broken spoke may not cause great weakness in a wheel, but surely brings the wheel out of true.
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Old 07-19-07, 09:43 PM   #3
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A. replace the spoke

B. Why did the spoke break? In my case my wife had solid tires installed without warning me and I kept breaking spokes until I went back to pneumatic tires.

C. During B on one ride I had 5 (five) broken spokes before I got home. Released the brakes and kept going. Much later with a much better wheel I rode a broken spoke for 2 months and the brakes were fine.

D. My Counterpoint tandem has an Akai 20" front wheel that carries a 300 lb load with no problems.
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Old 07-19-07, 09:44 PM   #4
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My colleague has a Speed P8 which broke rear spokes. Dahons have gained a bit of a reputation for that, probably mostly due to the policy that the LBS must check spoke tension before release to the customer. I think many LBSs just let them go as is, with the result that spokes don't last well.

Gaerlan offers whole wheels at really excellent prices. I would look at that avenue; perhaps you could swing a trade-in.
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Old 07-20-07, 12:17 AM   #5
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I second the recommendation of J. Gaerlan. A year of use on a set and still true as day 1.
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Old 07-20-07, 05:54 AM   #6
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I'd definitely replace the spoke, but if the spokes were tensioned wrong, they may keep breaking. If that happens, rebuild or replace the wheel.
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Old 07-20-07, 06:01 AM   #7
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I broke seven spokes in my 16 inch wheeler, mainly I think due to the fact that I had a broken one and didn't realise what the clicking sound was. I rode it for eighty miles heavy laden. This would bend the others as the wheel flexed and lead to fatigue failures. Small wheeled bikes also have a problem in that there is a steeper angle at the nipple and the elbow than say a 700c. This exacerbates the likleyhood of failures.

I'd replace the spoke and true the wheel using Sheldon Brown's guide to wheel truing. If more fail, it isn't a really big deal to replace them.
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Old 07-20-07, 06:38 AM   #8
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Break 1 spoke = replace it. Break another = replace them all with better spokes.
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Old 07-20-07, 07:39 AM   #9
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Quote:
Originally Posted by ken cummings View Post
D. My Counterpoint tandem has an Akai 20" front wheel that carries a 300 lb load with no problems.
Hey! We have a Counterpoint also. Fun tandem riding, eh?
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Old 07-20-07, 07:59 AM   #10
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Break 1 spoke = replace it. Break another = replace them all with better spokes.
+1

I'd also third using Gaerlan to rebuild the wheel if a 2nd spoke breaks.
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Old 09-09-07, 09:41 PM   #11
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I think that Dahon wheelbuilding uses Holland Mechanics machines, which means that the nippel cannot be mangles like in the picture. the machine grips it at the sqare end ....looks like somebody did a blodge job on those nipples ...

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Old 09-10-07, 07:44 AM   #12
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Originally Posted by brakemeister View Post
I think that Dahon wheelbuilding uses Holland Mechanics machines, which means that the nippel cannot be mangles like in the picture. the machine grips it at the sqare end ....looks like somebody did a blodge job on those nipples ...

thor
Given the number of Dahon's out there and all of the varying ways shops and people prep them, I am glad that Thor is a regular contributer on the forum. Really helps to understand the process and get at the issue.

Crimson, did you ever have a shop true your wheels for you?

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Old 09-10-07, 07:48 AM   #13
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I'd definitely replace the spoke, but if the spokes were tensioned wrong, they may keep breaking. If that happens, rebuild or replace the wheel.
While I never got to the point of spokes breaking, my first attempts at truing wheels were hack jobs on the rear wheel of a cyclocross bike. After putzing around with it for 4 months on constantly making small adjustments, I just re-did the entire wheel (same spokes and nipples) and have had no issues since.

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Old 09-10-07, 07:56 AM   #14
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forgot to mention.. if the nipples look like that ,,,,,,,,its time to replace ALL spokes and Nipples. there is something majorly wrong with the way these have been worked on ....

Gaerlan builds good wheels .... Dahon tries to bring more wheels in as well, but is starting to improove the spare parts stuff, and sometimes they get caught being out of stock...

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