#1
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Cants and elbows
Picture of a Campag Veloce rear hub and two spokes from the same wheel,
which was ridden around for 14000km before cracks appeared in the rim. One spoke is from the drive side and one from the non-drive side. I didn't build this wheel myself and I don't know what kind of "spoke line correction" may have been done. I don't know for either spoke whether it was outbound or inbound, but I think it was one of each as one of them also had more of a bend in it at the crossing. http://tinyurl.com/wl69x The hub flanges are both canted, and the spoke holes are parallel to the flanges, as if the flanges were drilled first and then formed into that curved-inwards shape. So canting about as optimal as it gets I'd say. In spite of that, and in spite of the fact that this is an aluminium hub and stainless steel spokes, the spokes clearly have different bends at the elbows presumably acquired during the build. |
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#2
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Cants and elbows
Ben C wrote:
Picture of a Campag Veloce rear hub and two spokes from the same wheel, which was ridden around for 14000km before cracks appeared in the rim. One spoke is from the drive side and one from the non-drive side. I didn't build this wheel myself and I don't know what kind of "spoke line correction" may have been done. and that's the key unknown. if the flange is appropriately canted and the holes are perpendicular to the flange, the math clearly shows "correction" to be unnecessary. if it still was done in spite of that, this evidences builder habit. I don't know for either spoke whether it was outbound or inbound, but I think it was one of each as one of them also had more of a bend in it at the crossing. http://tinyurl.com/wl69x The hub flanges are both canted, and the spoke holes are parallel to the flanges, as if the flanges were drilled first and then formed into that curved-inwards shape. So canting about as optimal as it gets I'd say. they're drilled after, but it's easy enough to do offset like that. In spite of that, and in spite of the fact that this is an aluminium hub and stainless steel spokes, the spokes clearly have different bends at the elbows presumably acquired during the build. yes, but how?! |
#3
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Cants and elbows
On 2006-12-21, jim beam wrote:
Ben C wrote: Picture of a Campag Veloce rear hub and two spokes from the same wheel, which was ridden around for 14000km before cracks appeared in the rim. One spoke is from the drive side and one from the non-drive side. I didn't build this wheel myself and I don't know what kind of "spoke line correction" may have been done. and that's the key unknown. if the flange is appropriately canted and the holes are perpendicular to the flange, the math clearly shows "correction" to be unnecessary. if it still was done in spite of that, this evidences builder habit. The wheels are the ones that came with the bike, so it's quite likely they were machine-built. I had a few problems with spokes coming loose on both wheels not long after buying the bike (about 6 years ago), and so tightened them up a bit and trued the wheels. So I don't think they were built by Jobst. |
#4
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Cants and elbows
Ben C wrote:
On 2006-12-21, jim beam wrote: Ben C wrote: Picture of a Campag Veloce rear hub and two spokes from the same wheel, which was ridden around for 14000km before cracks appeared in the rim. One spoke is from the drive side and one from the non-drive side. I didn't build this wheel myself and I don't know what kind of "spoke line correction" may have been done. and that's the key unknown. if the flange is appropriately canted and the holes are perpendicular to the flange, the math clearly shows "correction" to be unnecessary. if it still was done in spite of that, this evidences builder habit. The wheels are the ones that came with the bike, so it's quite likely they were machine-built. I had a few problems with spokes coming loose on both wheels not long after buying the bike (about 6 years ago), and so tightened them up a bit and trued the wheels. So I don't think they were built by Jobst. lol! |
#5
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Cants and elbows
Ben C wrote:
Picture of a Campag Veloce rear hub and two spokes from the same wheel, which was ridden around for 14000km before cracks appeared in the rim. One spoke is from the drive side and one from the non-drive side. I didn't build this wheel myself and I don't know what kind of "spoke line correction" may have been done. I don't know for either spoke whether it was outbound or inbound, but I think it was one of each as one of them also had more of a bend in it at the crossing. http://tinyurl.com/wl69x The hub flanges are both canted, and the spoke holes are parallel to the flanges, as if the flanges were drilled first and then formed into that curved-inwards shape. So canting about as optimal as it gets I'd say. In spite of that, and in spite of the fact that this is an aluminium hub and stainless steel spokes, the spokes clearly have different bends at the elbows presumably acquired during the build. here are spokes from a wheel built specifically /not/ having the spoke line "corrected". http://www.flickr.com/photos/38636024@N00/331112190/ |
#6
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Cants and elbows
On Sat, 23 Dec 2006 11:30:52 -0800, jim beam
wrote: Ben C wrote: Picture of a Campag Veloce rear hub and two spokes from the same wheel, which was ridden around for 14000km before cracks appeared in the rim. One spoke is from the drive side and one from the non-drive side. I didn't build this wheel myself and I don't know what kind of "spoke line correction" may have been done. I don't know for either spoke whether it was outbound or inbound, but I think it was one of each as one of them also had more of a bend in it at the crossing. http://tinyurl.com/wl69x The hub flanges are both canted, and the spoke holes are parallel to the flanges, as if the flanges were drilled first and then formed into that curved-inwards shape. So canting about as optimal as it gets I'd say. In spite of that, and in spite of the fact that this is an aluminium hub and stainless steel spokes, the spokes clearly have different bends at the elbows presumably acquired during the build. here are spokes from a wheel built specifically /not/ having the spoke line "corrected". http://www.flickr.com/photos/38636024@N00/331112190/ Dear Jim, Whew! I saw that you'd posted some spokes, couldn't figure out at a glance what the thread was trying to say, and tried to measure the angles by putting the picture into a paint program. I need a better program, a different approach, or better eyes. Probably some graphics program that would drag and drop one image onto another would help. As far as I can tell, the shaft of the lower spoke in the picture is very slightly curved upward. That is, a line drawn along the bottom each spoke will be almost straight up to the elbow on the upper spoke, but curves a little upward on the lower spoke: _ / -----------------------------' _ / -----------------************ curving up a tiny bit http://www.flickr.com/photos/38636024@N00/331112190/ I can't resolve any differences at the elbows themselves. Cheers, Carl Fogel |
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