find out the polarity of a hub
07-10-13, 09:40 AM
#3
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Question, What does "polarity" mean w/respect to hubs?
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07-10-13, 09:46 AM
#4
Jet Jockey
This makes no sense.
Is there some form of new magnetized hub out there?
Is there some form of new magnetized hub out there?
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07-10-13, 09:47 AM
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this article I used to build my wheels: https://sheldonbrown.com/wheelbuild.html
states that:
"The holes on the left flange do not line up with the holes on the right flange, but halfway between them. "
however this is not true in my case, the holes are not halfway but definietly off a bit.
Concerning that something seems wrong, because the tension on the spokes varies systematically between the spokes I wondered if i should try to build my wheel in another way than usual.
regards
m
states that:
"The holes on the left flange do not line up with the holes on the right flange, but halfway between them. "
however this is not true in my case, the holes are not halfway but definietly off a bit.
Concerning that something seems wrong, because the tension on the spokes varies systematically between the spokes I wondered if i should try to build my wheel in another way than usual.
regards
m
07-10-13, 09:50 AM
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How about telling us EXACTLY what parts you are trying to build the wheel out of, instead of asking an open ended and oddly worded question?
07-10-13, 09:58 AM
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I am trying to build a wheel using a
joytech flip-flop fixed-free hub ( RH A166DSE)
and a mavic r450 rim (622x14)
excuse my odd wording, but I am not familiar with bicycle-terminology.
joytech flip-flop fixed-free hub ( RH A166DSE)
and a mavic r450 rim (622x14)
excuse my odd wording, but I am not familiar with bicycle-terminology.
07-10-13, 10:03 AM
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nevermind. I left the tab open too long looking at other threads and later posts clarified and made my suggestion irrelevant.
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07-10-13, 10:08 AM
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ALL hubs have the flanges phased 1/2 hole apart, so the spoke sequence is right flange, left flange, right, left.... (there a few exceptions designed for unique lacing patterns)
Unless your hub was specifically made for a rim where the spoke holes are unevenly spaced for paired an spoke pattern the hub is poorly made. You can still build it normally, but you'll get some hi/lo spoke lengths at the nipple.
Unless your hub was specifically made for a rim where the spoke holes are unevenly spaced for paired an spoke pattern the hub is poorly made. You can still build it normally, but you'll get some hi/lo spoke lengths at the nipple.
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“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
07-10-13, 10:19 AM
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thanks, my concern where exactly the hi/lo spokes. but it seems unavoidable.
RH and LH have nothing to do with my problem right? because I did not consider that my hub is RH (Right Handed?).
RH and LH have nothing to do with my problem right? because I did not consider that my hub is RH (Right Handed?).
07-10-13, 10:27 AM
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Personally, I would ditch that hub and get something that was made correctly.
07-10-13, 12:43 PM
#13
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I am fairly positive that this discussion is going to end up negatively (potentially of course), on the other hand if we take a pole, I'm sure some will charge that its an amped up debate, I think its black and white (or red) myself, but I can also see the disconnect, so... (you shook me all night long playing in the background)
07-10-13, 12:59 PM
#14
Banned
I'm +1 with this : "Personally, I would ditch that hub and get something that was made correctly"
why start building off a defective hub?.
why start building off a defective hub?.
07-10-13, 03:02 PM
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OP: I've got some Joytech hubsets and a bmx and track set. A075/76 with cartridge bearings. The spoke hole drillings were a half space offset on each hub flange. Can't remember the track set. Might be the same as the one you have. How are you determining that the hole isn't half way? Sometimes looks can be deceiving.
If the offset isn't exactly half, but very close, then it really doesn't matter about polarity. Some spokes will likely be less half mm longer than optimum and some the same fraction shorter. But as long has you have sufficient threaded length on your spoke and nipples are not bottomed out, the small amount of error shouldn't cause too much problems if you can build a relatively uniform tensioned wheel. However, if you're using a hub with few spokes (less than 28) or the offset is not near the middle but nearly lined up hole to hole across flanges, then like the folks above suggested, you're likely better off trying to get a new hub. If you can return the hub, try that and cite the defect. But again, how are you measuring that the spoke holes are not offset in the middle between the flanges?
If the offset isn't exactly half, but very close, then it really doesn't matter about polarity. Some spokes will likely be less half mm longer than optimum and some the same fraction shorter. But as long has you have sufficient threaded length on your spoke and nipples are not bottomed out, the small amount of error shouldn't cause too much problems if you can build a relatively uniform tensioned wheel. However, if you're using a hub with few spokes (less than 28) or the offset is not near the middle but nearly lined up hole to hole across flanges, then like the folks above suggested, you're likely better off trying to get a new hub. If you can return the hub, try that and cite the defect. But again, how are you measuring that the spoke holes are not offset in the middle between the flanges?
