#1
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Pedal Problem.
Hey all, On my new street uni my pedals come loose every 5 min, its really ****ing me off. Any ideas on how to keep it snug? Remember the koxx cranks require a washer inbetween the pedal and crank. Ok, from my knowlage the pedals are threded so if you are riding forwards, they will tighten themselfs, But i stared at my pedals/cranks and spun the pedal, and i am 99% sure that pedaling forwards will unscrew them, but yet the R is on the right side and the L is on teh left side. -- Evan Byrne - I Bc. ------------------------------------------------------------------------ Evan Byrne's Profile: http://www.unicyclist.com/profile/9367 View this thread: http://www.unicyclist.com/thread/42434 |
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#2
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Pedal Problem.
try some other pedals. if they fall off, its the cranks. if they stay on, its the pedals. -- jagur - Random Unicyclist smoke me a kipper, i'll be back for breakfast. --------------------------------------------------- -forget_your_life- -------------------------------------- -------*muni militia *------- *one wheeled death squad* ------------------------------------------------------------------------ jagur's Profile: http://www.unicyclist.com/profile/502 View this thread: http://www.unicyclist.com/thread/42434 |
#3
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Pedal Problem.
I dont have any and dont have enough money for new ones. -- Evan Byrne - I Bc. ------------------------------------------------------------------------ Evan Byrne's Profile: http://www.unicyclist.com/profile/9367 View this thread: http://www.unicyclist.com/thread/42434 |
#4
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Pedal Problem.
I just coated the thred in loctite -- Evan Byrne - I Bc. ------------------------------------------------------------------------ Evan Byrne's Profile: http://www.unicyclist.com/profile/9367 View this thread: http://www.unicyclist.com/thread/42434 |
#5
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Pedal Problem.
does it work -- MERCYME - Smooth Criminal 'Gallery' (gallery.unicyclist.com/danpics) AIM-Mr Mercy3 ------------------------------------------------------------------------ MERCYME's Profile: http://www.unicyclist.com/profile/9764 View this thread: http://www.unicyclist.com/thread/42434 |
#6
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Pedal Problem.
i dont know yet -- Evan Byrne - I Bc. ------------------------------------------------------------------------ Evan Byrne's Profile: http://www.unicyclist.com/profile/9367 View this thread: http://www.unicyclist.com/thread/42434 |
#7
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Pedal Problem.
The pedals would unscrew when pedaling forwards if not for a phenomenon called "precession". Here's what Sheldon Brown has to say about it in his 'glossary pages under 'p' for pedal' (http://www.sheldonbrown.com/gloss_p.html) The right pedal has a normal thread, but the left pedal has a left (reverse) thread. The reason for this is not obvious: The force from bearing friction would, in fact, tend to unscrew pedals threaded in this manner. The fact is, however, that it is not the bearing friction that makes pedals unscrew themselves, but a phenomenon called "precession". You can demonstrate this to yourself by performing a simple experiment. Hold a pencil loosely in one fist, and move the end of it in a circle. You will see that the pencil, as it rubs against the inside of your fist, rotates in the opposite direction. Ignorant people outside the bike industry sometimes make the astonishing discovery that the way it has been done for 100 years is "wrong." "Look at these fools, they go to the trouble of using a left thread on one pedal, then the bozos go and put the left thread on the wrong side! Shows that bicycle designers have no idea what they are doing..." Another popular theory of armchair engineers is that the threads are done this way so that, if the pedal bearing locks up, the pedal will unscrew itself instead of breaking the rider's ankle. The left threaded left pedal was not the result of armchair theorizing, it was a solution to a real problem: people's left pedals kept unscrewing! I have read that this was invented by the Wright brothers, but I am not sure of this. Note! The precession effect doesn't substitute for screwing your pedals in good and tight. It is very important to do so. The threads (like virtually all threads on a bicycle) should be lubricated with grease, or at least with oil. And another page at Sheldon Brown's site about 'left-handed threads' (http://www.sheldonbrown.com/brandt/left.html) A search of the forum for "precession" will find other threads about it. Make sure that you don't have pedals with 1/2" threads. There are two primary pedal sizes. 1/2" for kids bikes and bikes with one piece cranks and the more common 9/16" size that most unicycles now use. 1/2" is just slightly smaller than 9/16". A 1/2" pedal in a 9/16" crank hole will undo itself very quicly. It is also possible that your pedals are just slightly out of spec and the threads are just a little bit too small. It has happened before. If that is the case you may be able to return them to the place you bought them for a replacement. -- john_childs - Guinness Mojo john_childs (att) hotmail (dott) com Gallery: '' (http://gallery.unicyclist.com/john_childs) ' Unicycling Bookmark List' (http://backcountry.unicyclist.com/) :: 'World Clock' (http://tinyurl.com/a99y3) 'Click Me' (http://tinyurl.com/7lvbu) ------------------------------------------------------------------------ john_childs's Profile: http://www.unicyclist.com/profile/449 View this thread: http://www.unicyclist.com/thread/42434 |
#8
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Pedal Problem.
The pedals would unscrew when pedaling forwards if not for a phenomenon called "precession". Here's what Sheldon Brown has to say about it in his 'glossary pages under 'p' for pedal' (http://www.sheldonbrown.com/gloss_p.html) The right pedal has a normal thread, but the left pedal has a left (reverse) thread. The reason for this is not obvious: The force from bearing friction would, in fact, tend to unscrew pedals threaded in this manner. The fact is, however, that it is not the bearing friction that makes pedals unscrew themselves, but a phenomenon called "precession". You can demonstrate this to yourself by performing a simple experiment. Hold a pencil loosely in one fist, and move the end of it in a circle. You will see that the pencil, as it rubs against the inside of your fist, rotates in the opposite direction. Ignorant people outside the bike industry sometimes make the astonishing discovery that the way it has been done for 100 years is "wrong." "Look at these fools, they go to the trouble of using a left thread on one pedal, then the bozos go and put the left thread on the wrong side! Shows that bicycle designers have no idea what they are doing..." Another popular theory of armchair engineers is that the threads are done this way so that, if the pedal bearing locks up, the pedal will unscrew itself instead of breaking the rider's ankle. The left threaded left pedal was not the result of armchair theorizing, it was a solution to a real problem: people's left pedals kept unscrewing! I have read that this was invented by the Wright brothers, but I am not sure of this. Note! The precession effect doesn't substitute for screwing your pedals in good and tight. It is very important to do so. The threads (like virtually all threads on a bicycle) should be lubricated with grease, or at least with oil. And another page at Sheldon Brown's site about 'left-handed threads' (http://www.sheldonbrown.com/brandt/left.html) A search of the forum for "precession" will find other threads about it. Make sure that you don't have pedals with 1/2" threads. There are two primary pedal sizes. 1/2" for kids bikes and bikes with one piece cranks and the more common 9/16" size that most unicycles now use. 1/2" is just slightly smaller than 9/16". A 1/2" pedal in a 9/16" crank hole will undo itself very quicly. It is also possible that your pedals are just slightly out of spec and the threads are just a little bit too small. It has happened before. If that is the case you may be able to return them to the place you bought them for a replacement. -- john_childs - Guinness Mojo john_childs (att) hotmail (dott) com Gallery: '' (http://gallery.unicyclist.com/john_childs) ' Unicycling Bookmark List' (http://backcountry.unicyclist.com/) :: 'World Clock' (http://tinyurl.com/a99y3) 'Click Me' (http://tinyurl.com/7lvbu) ------------------------------------------------------------------------ john_childs's Profile: http://www.unicyclist.com/profile/449 View this thread: http://www.unicyclist.com/thread/42434 |
#9
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Pedal Problem.
are you sure that you're facing the right direction? try turning the seat around. -- James_Potter - betcha can't stick it! ------------------------------------------------------------------------ James_Potter's Profile: http://www.unicyclist.com/profile/3807 View this thread: http://www.unicyclist.com/thread/42434 |
#10
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Pedal Problem.
Evan Byrne wrote: *pedaling forwards will unscrew them, but yet the R is on the right side and the L is on teh left side. * oh, nevermind. unless they just the stickers. maybe they're on wrong for some reason. unscrew the pedal, and look on the end of the screw part, it should say L or R on the metal there. -- James_Potter - betcha can't stick it! ------------------------------------------------------------------------ James_Potter's Profile: http://www.unicyclist.com/profile/3807 View this thread: http://www.unicyclist.com/thread/42434 |
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