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Wheel Truing Tutorial
I hope the group finds this week's wheel truing tutorial useful. I
tried to cover all the aspects of truing without running overtime. I'd love to hear what you think... http://bicycletutor.com/wheel-truing/ |
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#3
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Wheel Truing Tutorial
Whow? Pre-stressing? Not stress-relieving?
After truing, the spokes will get stressed when you take the first ride, and you'll have to re-adjust anyways. Therefore, you should pre- stress them beforehand. Or you can call it 'stress-relieving' if you wish... I think most people get the meaning. Really? Two turns? Not a turn and a half? Or one and one-quarter? In this regard, each wheel is different, depending on how many sprockets are on the rear cluster or freewheel. I've given the average as there was not enough time to be more specific about every type of wheel. Hopeless..... You might be missing the point... If this tutorial helps one single person true their own wheel, then it is far from hopeless. |
#4
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Wheel Truing Tutorial
Alexander Ramon wrote:
Whow? Pre-stressing? Not stress-relieving? After truing, the spokes will get stressed when you take the first ride, and you'll have to re-adjust anyways. Therefore, you should pre-stress them beforehand. Or you can call it 'stress-relieving' if you wish... I think most people get the meaning. What causes the stress when you first ride it, stress that wasn't there before, when it was freshly built? I think you have an incorrect visualization of stress in wheels. Bicycle wheels are pre stressed structures, an effect that enables their spokes to withstand compressive loads. Tensioning spokes is where pre-stressing occurs. Stress relieving is performed to prevent spokes from fatigue failures caused by load cycles with every rotation when in use. Reducing peak stress in a freshly spoked wheel is an important operation to make wheels durable. Really? Two turns? Not a turn and a half? Or one and one-quarter? In this regard, each wheel is different, depending on how many sprockets are on the rear cluster or freewheel. I've given the average as there was not enough time to be more specific about every type of wheel. This can be described in a generic way and is so in "the Bicycle Wheel" where the process is explained in plain language. Hopeless..... You might be missing the point... If this tutorial helps one single person true their own wheel, then it is far from hopeless. I think that is generous criterion. Jobst Brandt |
#5
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Wheel Truing Tutorial
Bill Sornson wrote:
http://bicycletutor.com/wheel-truing/ Inaccurate and illiterate. Pre-stressing spokes Whow? Pre-stressing? Not stress-relieving? It's right under a heading entitled "Stress Relieving". Once a wheel is true, isn't squeezing the spokes a way of "pre-stressing" them before riding on them? Why are you picking such a tiny, insignificant nit? No. That isn't a means of pre-stressing spokes, unless you are changing the structural meaning of pre-stressing. Stretching the spokes by squeezing them in pairs momentarily increases their tension to cause yielding at high stress points at the elbow and threads. It does not change the tension in spokes, the tension that is the pre-stress of a wheel. I think the concept of pre-stressing has been here often, as in pre-stressed concrete that has much in common with pre-stressed spokes, except that concrete cannot support tension and spokes cannot support compression without being pre-stressed. Jobst Brandt |
#6
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Wheel Truing Tutorial
Alexander Ramon wrote:
Whow? Pre-stressing? Not stress-relieving? After truing, the spokes will get stressed when you take the first ride, and you'll have to re-adjust anyways. Therefore, you should pre-stress them beforehand. Or you can call it 'stress-relieving' if you wish... I think most people get the meaning. What causes the stress when you first ride it, stress that wasn't there before, when it was freshly built? I think you have an incorrect visualization of stress in wheels. Bicycle wheels are pre-stressed structures, an effect that enables their spokes to withstand compressive loads. Tensioning spokes is where pre-stressing occurs. Stress relieving is performed to prevent spokes from failuring in fatigue during load cycles with each rotation in use. Reducing peak stress after building a wheel is an important operation to make it durable. Really? Two turns? Not a turn and a half? Or one and one-quarter? In this regard, each wheel is different, depending on how many sprockets are on the rear cluster or freewheel. I've given the average as there was not enough time to be more specific about every type of wheel. This can be described in a generic way and is so in "the Bicycle Wheel" where the process is explained in plain language. Hopeless..... You might be missing the point... If this tutorial helps one single person true their own wheel, then it is far from hopeless. I think that is generous criterion. Jobst Brandt |
#7
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Wheel Truing Tutorial
You might be missing the point... If this tutorial helps one single person true their own wheel, then it is far from hopeless. I think that is generous criterion. Jobst Brandt Why is that a 'generous criterion'? |
#8
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Wheel Truing Tutorial
Alex Ramon wrote:
You might be missing the point... If this tutorial helps one single person true their own wheel, then it is far from hopeless. I think that is generous criterion. Why is that a 'generous criterion'? Either "far from hopeless" or single person's experience is being overrated. Jobst Brandt |
#9
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Wheel Truing Tutorial
yeah...coming here asking RBT for comment is off course useless and
demeaning but aside from that. GARGLE FIRST. get some air in your lungs. breathe deep. rising falling rising falling does the Tutorial teach wheel truing. Not really. You speak, move your hands, saying turn the nipples on the right to bring rim right, turn 4 (six six six but less with incerasing torque...) I live in an asylum. Occasionally bringing the bike out onto the "common area" for a rolling wheel true before heading out to DO SOMETHING. Other asylumites comment: "how does he do that, the bike shop...." "He's done that for years..." Ever try telling a rider, not a serious rider off course, the rear wheel is out an inch, the tire is wearing away...then tutorial turn tight right, loosen left, the rim goes, bend straightens? whaddya get? a glassy look. synaptic seizure. like when I say ERD ERD... Without a graphic following a "survival in the artic" monologue, graphic showing turns and rim movement singularly and symphonically, in brilliant color. A graphic pierceing the synaptic seizure, you wind up saying: this is a cat, this is a dog, and this is my mommy. "That's" whose listening and "that's" what you're telling "them." A reciprocal relationship. As it is, a "survival" op, best to simplify the message and forget the trimmings unless trimmings are meant to impress the Campy/carbon/ glacier crowd of materialist excess. oooooo lookit the shiny wheel? Yeah, simply and explain turn right go right.... but there again a graphic upside and downside. INVEST IN THE SOFTWARE! excuse me I'm gonna throw up.... |
#10
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Wheel Truing Tutorial
HI KIDS! I'M AUTO DISSMARK (COSTUME-looks like?) AND I'M GONNA SHOW YOU HOW A BICYCLE WHEEL IS STRAIGHTENED First we need a bent bicycle wheel. KNOCKOUT REDHEAD BRINGS IN WHEEL. Auto holdsup straight wheel and bends it into a pretzel. Short 15 second video of crazy kid jumping his bike, trashing the wheel. Kid wipes his face out on chip and tar. Auto, off course, has a room filled with wheels pre-tuned for each segment of this disaster Auto pulls out a 3' monkey wrench, walks over to a bent rim section 2' wide with proportional spokes and... graphics arrows move directionally as Auto torques, with handle direction graphics... followed by a cartoon of same (gotta repeat) and I'll leave it to yawl to finish... |
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