What loosens wheel spokes
09-21-09, 08:38 AM
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What loosens wheel spokes
I heard that when one rides through bumps on the road the spokes could loosen up. Also heard that when one rides in the rain this could also loosen them. I could understand the bumps on the road but could not understand riding in the rain. Any other causes and explanations?
Appreciate your comments.
Appreciate your comments.
09-21-09, 08:54 AM
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I'm going to weigh in with not-so-good build quality.
When you ride for the first time on a brand new wheelset have you ever heard some little "ping" sounds? That's a sign the wheels weren't "stress relieved" after they were tensioned. I'm not sure that stress relieving is the most techincally accurate term. I do know that if you overtension the spokes by either pulling parallel pairs of spokes together or by pushing opposite sides of the rim towards the floor, the elbows will seat in the hub, the nipples will seat in the rim, and it will let the twist out of the spokes. If all of the spokes are equally tight, that'll keep them that way.
If one spoke is a little looser than it's neighbors, when that part of the rim is on bottom, it'll loosen a little more which may allow the nipple to unthread a little. That's my theory.
Disclaimer. I ain't no engineer but I'm a half way decent bicycle wheel builder.
When you ride for the first time on a brand new wheelset have you ever heard some little "ping" sounds? That's a sign the wheels weren't "stress relieved" after they were tensioned. I'm not sure that stress relieving is the most techincally accurate term. I do know that if you overtension the spokes by either pulling parallel pairs of spokes together or by pushing opposite sides of the rim towards the floor, the elbows will seat in the hub, the nipples will seat in the rim, and it will let the twist out of the spokes. If all of the spokes are equally tight, that'll keep them that way.
If one spoke is a little looser than it's neighbors, when that part of the rim is on bottom, it'll loosen a little more which may allow the nipple to unthread a little. That's my theory.
Disclaimer. I ain't no engineer but I'm a half way decent bicycle wheel builder.
09-21-09, 10:53 AM
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spoke unwinds but the nipple sticks to the rim (at least if the builder was stupid enough to not unwind them during destressing)
spokes stretching, allowing the tension to drop, causing lower friction for the nipples to unwind. (this takes awhile on 2.0/1.5mm DB spokes).
lacing pattern and proper anti-seize Radial lacing requires loctite on the spoke threads, but with a tangent, some heavy oil is all that is needed.
spokes stretching, allowing the tension to drop, causing lower friction for the nipples to unwind. (this takes awhile on 2.0/1.5mm DB spokes).
lacing pattern and proper anti-seize Radial lacing requires loctite on the spoke threads, but with a tangent, some heavy oil is all that is needed.
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
