Jez Posted September 6, 2006 Report Share Posted September 6, 2006 (edited) OK, so here's the story:A few weeks ago I was on my way home from work. Did the world's smallest pedalhop onto a kerb (slightly harsh landing to be fair, but not exactly world-ending), and there's an almighty bang. Upon inspection, two spokes have snapped at the hub end.Fair enough, I though, musta been too harsh a landing and possibly some dodgy spokes. Replaced said spokes and moved on.Then on Saturday, same thing again, but this time FIVE spokes all broke at the same time, all at the hub end. Thus, I have a Sun Rhyno Lite in the shape of a Walkers Cheese & Onion.Some more info:They were all leading spokes on the drive side of the rear wheelWhen I built said wheel (according to Sheldon Brown's site), I was a bit worried that the drive side seemed immensely tighter than the non-drive side. And I mean a LOT tighter, more than is normal (yes, I know the drive side is always somewhat tighter).Hub is a second-hand Hope XC (ebay)Rim & Spokes were from CRC less than a few months ago.'Twas laced 32 hole 3-crossSpokes were a little bit short - there was about 1mm ish of thread showing on all the non-drive side spokes.The dead spokes seem to have a slightly flattened edge just by the where bend is.I have a feeling there's summat up with my frame (old Base TA26) - if I true a wheel to look normal at the seatstays, it looks closer to the non-drive side at the chain stays. Only by a gnat's bollock, but still...So the question is: is the spoke death due to overtightening the drive side? Or could it be a faulty batch of spokes? Could I have laced it wrong (it all looked OK, and I checked it against SB's site's instructions)? Could the spokes have stretched (thus making them weaker) at the hub end?Anyone ever had this happen before and know what the problem was? I could do with figuring out what it is before I go lacing the damned thing up again.Cheers. Edited September 6, 2006 by Jez Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted September 6, 2006 Report Share Posted September 6, 2006 It could be a wide variety of things unfortuatlyCould be your riding - too many harsh spins/spinning drops etc.Could have been a bad batch - but not highly likely to be honest. Then again, as its quite un-heard of, this could be trueCould be over stressing one side - as you said they were slightly too small, but I would have thought that would have only stripped the threads at the end of the spoke as opposed to snap it clean I honestly cant understand why this has happened and thus make a sensible explanation. A bad batch is the easiest option but I still cant see it to be honest. At a guess its the spokes fault, and not the hub as unless the flange is too wide, its not going to make much of a difference. Baffled sorry Quote Link to comment Share on other sites More sharing options...
Jez Posted September 8, 2006 Author Report Share Posted September 8, 2006 It could be a wide variety of things unfortuatlyCould be your riding - too many harsh spins/spinning drops etc.Could have been a bad batch - but not highly likely to be honest. Then again, as its quite un-heard of, this could be trueCould be over stressing one side - as you said they were slightly too small, but I would have thought that would have only stripped the threads at the end of the spoke as opposed to snap it clean I honestly cant understand why this has happened and thus make a sensible explanation. A bad batch is the easiest option but I still cant see it to be honest. At a guess its the spokes fault, and not the hub as unless the flange is too wide, its not going to make much of a difference. Baffled sorry D'oh. My thoughts exactly. I'm pushed to believe it's a bad batch, and considering that I've barely ridden trials on that particular bike (it's actually only really getting use as my work bike at the mo because I ride my mod for trials in general) I seriously doubt that it's my riding. I had a Ronnie on STX that was laced completely wrong, and that never destroyed any spoke like this. These were thick spokes as well. They looked thicker than normal anyway.And I see your point about stripping the thread of the spoke being a more likely result of overstressing one side of the wheel.The only thing that I can think of is that the tension stretched the spokes at the hub end a bit, thus weakening them there.Other than that I have no feckin' idea.Anyone else have a clue? Quote Link to comment Share on other sites More sharing options...
philking Posted September 9, 2006 Report Share Posted September 9, 2006 I would say its almost deffinately a result of over tightening the drive side. If you can still see thread but they are mighty tight as you say, then you should of changed them.If i were you i would replace all the drive side spokes for 2mm longer ones. They are probably snapping at the hub end because thats where they are bent, hence a weak point at which pressure builds up - in this case pressure that is over loading. Quote Link to comment Share on other sites More sharing options...
loffa Posted September 9, 2006 Report Share Posted September 9, 2006 How old is the hub? a few of my mates who ride xc have had that problem. The spoke holes on the hub wear out a bit and the edges become sharp so they will 'cut' your spokes. Quote Link to comment Share on other sites More sharing options...
Christophe' Posted September 9, 2006 Report Share Posted September 9, 2006 OK, so here's the story:A few weeks ago I was on my way home from work. Did the world's smallest pedalhop onto a kerb (slightly harsh landing to be fair, but not exactly world-ending), and there's an almighty bang. Upon inspection, two spokes have snapped at the hub end.Fair enough, I though, musta been too harsh a landing and possibly some dodgy spokes. Replaced said spokes and moved on.Then on Saturday, same thing again, but this time FIVE spokes all broke at the same time, all at the hub end. Thus, I have a Sun Rhyno Lite in the shape of a Walkers Cheese & Onion.Some more info:They were all leading spokes on the drive side of the rear wheelWhen I built said wheel (according to Sheldon Brown's site), I was a bit worried that the drive side seemed immensely tighter than the non-drive side. And I mean a LOT tighter, more than is normal (yes, I know the drive side is always somewhat tighter).Hub is a second-hand Hope XC (ebay)Rim & Spokes were from CRC less than a few months ago.'Twas laced 32 hole 3-crossSpokes were a little bit short - there was about 1mm ish of thread showing on all the non-drive side spokes.The dead spokes seem to have a slightly flattened edge just by the where bend is.I have a feeling there's summat up with my frame (old Base TA26) - if I true a wheel to look normal at the seatstays, it looks closer to the non-drive side at the chain stays. Only by a gnat's bollock, but still...So the question is: is the spoke death due to overtightening the drive side? Or could it be a faulty batch of spokes? Could I have laced it wrong (it all looked OK, and I checked it against SB's site's instructions)? Could the spokes have stretched (thus making them weaker) at the hub end?Anyone ever had this happen before and know what the problem was? I could do with figuring out what it is before I go lacing the damned thing up again.Cheers.haha,,,,,,,,,sorry ,,,,,,,another wheel question the frame is the problem.if you want to build good wheels,,,,,try to have the brains to go with it!argh,,,,,it needs logical thinkingarg Quote Link to comment Share on other sites More sharing options...
nafan Posted September 9, 2006 Report Share Posted September 9, 2006 Most likely just doing too much spinny stuff, tightness of spokes and length of spokes...All of mine have started snapping recently, normally when I do sidehop gaps and front wheel spins etc.Nathan Quote Link to comment Share on other sites More sharing options...
Jez Posted September 10, 2006 Author Report Share Posted September 10, 2006 RightIt's the NON-drive side spokes that were too long and quite loose, and you could see the thread. The drive side ones were the tight ones that were about the right length (no thread visible).I haven't actually done ANYTHING spinny on that bike yet, and definitely not on that wheel. Like I said before, I haven't really had chance to do any proper riding on that bike yet bar kerbs and small stuff on the way to work.Dunno how old the hub is, was second hand off ebay.Is it possible it could be a result of me somehow messing up the lacing? Quote Link to comment Share on other sites More sharing options...
Tomm Posted September 10, 2006 Report Share Posted September 10, 2006 Was it dished correctly? I can't see why one side would be significantly tighter than the other unless you built it wrong - I.e. too much dish, wrong lacing pattern etc. Unless you're getting to the end of the spoke thread and can't tighten them any more (Which doesn't seem to be the case?) then it can't be just to do with the spoke length. I very much doubt that you can wear hubs so that they have sharp edges - friction and abrasion will just make smooth edges. Unless you (or the previous owner) laced it wrong I guess.My guess would be that the frame's completely wonky and you were forced to dish the wheel way too much - Try it in another frame? Quote Link to comment Share on other sites More sharing options...
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