|
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Pedal came off crank arm while riding
I would of never believed it but my left pedal came off the crank arm
when riding. Luckily I was slowing down and reached the end of my destination when the accident occurred. I believe I did not tighten the pedal enough and the pedalling motion loosened the pedal. My theory is that the pedal came 75 % off and on my final downward power stroke the lateral force stripped off the pedal from the crank arm. After getting up from the crash, I looked inside the threading of the left crank arm and noticed that the last few threads were completely stripped. I was lucky and not too seriously hurt, but it could of been more serious (even fatal) if was travelling alongside cars and going at a higher speed. Once the pedal comes off you use control of the bike. I know why people use loctite on pedals. I looked over the bike and most of it looks okay. I am wondering though what I should do with the pedal and left crank arm? I can force the pedal back into the first few broken threads, but that doesn't seem too smart. Should I get the left crank arm re-threaded or maybe just get another replacement left crank arm? Its only a Sugino VP, nothing spectacular. Thanks. |
Ads |
#2
|
|||
|
|||
Pedal came off crank arm while riding
"Gordon" wrote in message
m... I would of never believed it but my left pedal came off the crank arm snip.. bike. I know why people use loctite on pedals. I've never seen loctite on pedals. In my experience, if you properly tighten the pedal, it is not necessary. In fact, the opposite is true..pedals are usually difficult to remove once they've been in there a year or two. I looked over the bike and most of it looks okay. I am wondering though what I should do with the pedal and left crank arm? I can force the pedal back into the first few broken threads, but that doesn't seem too smart. Should I get the left crank arm re-threaded or maybe just get another replacement left crank arm? Its only a Sugino VP, nothing spectacular. Thanks. Get a new left crank. They're generally pretty cheap if you don't have something exotic. The threads are garbage on the old arm and it's not worth fixing, IMHO. You can try to heli-coil it but nothing else will work. The pedal is likely fine, being much harder than the alu. crank. Make sure no thread or alu. bits are left in the pedal threads. Cheers, Scott.. |
#3
|
|||
|
|||
Pedal came off crank arm while riding
|
#4
|
|||
|
|||
Pedal came off crank arm while riding
"Gordon" wrote in message
m... I would of never believed it but my left pedal came off the crank arm when riding. Luckily I was slowing down and reached the end of my destination when the accident occurred. I believe I did not tighten the pedal enough and the pedalling motion loosened the pedal. My theory is that the pedal came 75 % off and on my final downward power stroke the lateral force stripped off the pedal from the crank arm. After getting up from the crash, I looked inside the threading of the left crank arm and noticed that the last few threads were completely stripped. I was lucky and not too seriously hurt, but it could of been more serious (even fatal) if was travelling alongside cars and going at a higher speed. Once the pedal comes off you use control of the bike. I know why people use loctite on pedals. I looked over the bike and most of it looks okay. I am wondering though what I should do with the pedal and left crank arm? I can force the pedal back into the first few broken threads, but that doesn't seem too smart. Should I get the left crank arm re-threaded or maybe just get another replacement left crank arm? Its only a Sugino VP, nothing spectacular. Don't locktite them, use a grease or oil and check the right pedal after you buy a new left arm. Sugino lefts are ubiquitous and dirt cheap. You only need to know the length which is stamped/cast in the inside of the arm. Lubricate the crank taper [or not*] and lubricate the fastener's thread and face. *Illogical as it may seem, respected adherents of both persuasions seem not to experience failure. Me, I lube everything that moves and a lot of things that don't. -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
#5
|
|||
|
|||
Pedal came off crank arm while riding
A Muzi wrote:
"Gordon" wrote in message m... I would of never believed it but my left pedal came off the crank arm when riding. Luckily I was slowing down and reached the end of my destination when the accident occurred. I believe I did not tighten the pedal enough and the pedalling motion loosened the pedal. My theory is that the pedal came 75 % off and on my final downward power stroke the lateral force stripped off the pedal from the crank arm. After getting up from the crash, I looked inside the threading of the left crank arm and noticed that the last few threads were completely stripped. I was lucky and not too seriously hurt, but it could of been more serious (even fatal) if was travelling alongside cars and going at a higher speed. Once the pedal comes off you use control of the bike. I know why people use loctite on pedals. I looked over the bike and most of it looks okay. I am wondering though what I should do with the pedal and left crank arm? I can force the pedal back into the first few broken threads, but that doesn't seem too smart. Should I get the left crank arm re-threaded or maybe just get another replacement left crank arm? Its only a Sugino VP, nothing spectacular. Don't locktite them, use a grease or oil and check the right pedal after you buy a new left arm. Sugino lefts are ubiquitous and dirt cheap. You only need to know the length which is stamped/cast in the inside of the arm. Lubricate the crank taper [or not*] and lubricate the fastener's thread and face. *Illogical as it may seem, respected adherents of both persuasions seem not to experience failure. Me, I lube everything that moves and a lot of things that don't. And, if at all possible, use a torque wrench when you tighten it! All the pedals that I've used have a hex key hole on the inside so that you can do this. YMMV. David |
#6
|
|||
|
|||
Pedal came off crank arm while riding
NOT LOCTITE-Use a good grease and install tight-gordon- I would of never believed it but my left pedal came off the crank arm when riding. BRBR I know why people use loctite on pedals. BRBR NOT LOCTITE-Use a good grease and install tight- Gordon I can force the pedal back into the first few broken threads, BRBR Take it to a decent bike shop and have them chase the threads, and check the right pedal as well... Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302 (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene" |
#7
|
|||
|
|||
Pedal came off crank arm while riding
Qui si parla Campagnolo wrote:
Take it to a decent bike shop and have them chase the threads, and check the right pedal as well... I have found that the threads can generally be successfully cleaned up by inserting the pedal from the wrong side (and then putting it back as normal before riding off :-) I've had a couple of pedals unscrew on me, before I learnt that they really did have to be done up properly (not hugely tight, but properly snug) despite the precession effect. James |
#8
|
|||
|
|||
Pedal came off crank arm while riding
lfdavis wrote in message ...
The same thing happened to me with the right pedal. I had taken the crank off and cleaned it, and apparently just hand tightened the pedal. I was more unfortunate as I hit the pavement and came away with bruised ribs and a busted helmet. Other than the stripped pedal, the bike was all right since it landed on me. You were less fortunate than me, I only had scrapes on my left knee and arm. Even though I was wearing wearing, its an extremely dangerous and scary situation losing control like that. Once the pedals pops off, you lose most of your balance and control. I was really lucky that it did not pop off on the major streets with cars zooming by me (I usually go pretty decent speeds on those stretches). When I was referring to using loctite on pedals I meant stores, my friend bought a Miele MTN bike and they used loctite on most of the parts (including pedals). I guess they didn't want a rare situation of a pedal coming off (could possibly lead to a lawsuit?). I am pretty sure that there must be a case of some business store having a customer returning a bike with a pedal coming off. Rare situation, but probably an unpleasent situation. |
#9
|
|||
|
|||
Pedal came off crank arm while riding
A bike store can chase the threads for me, but I would like to know
more about the process how it works? Its hard for me to visualize it repairing the threads and still being as durable originally. Doesn't chasing make the pedal hole bigger? I am purposely not using that crank and pedal to prevent further damage to the bike and myself. I want to make the best and safest decision. Thanks. |
#10
|
|||
|
|||
Pedal came off crank arm while riding
"Gordon" wrote in message
om... A bike store can chase the threads for me, but I would like to know more about the process how it works? Its hard for me to visualize it repairing the threads and still being as durable originally. Doesn't chasing make the pedal hole bigger? I am purposely not using that crank and pedal to prevent further damage to the bike and myself. I want to make the best and safest decision. Thanks. Sometimes, if you didn't take out too many threads when the pedal came out, you can clean up what's left, put the pedal back in and there will be enough purchase left to tighten the pedal again against the crank. I've had this both work and not work. You really can't tell until you try and see how it tightens up. All in all, a new left crank like yours is probably $20 or so. When working in a shop, you've got to be VERY certain that nothing catastrophic will happen once that bike leaves your shop. As a consequence, we just generally replaced the arm and that was that. If it was someone we knew and they understood the risks, we'd try chasing and re-installing. It's your (and your shop's) call. Re-installing that pedal in that crank will NOT be as strong as when it was not damaged. The question is, is it strong enough? Cheers, Scott.. |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
FAQ on choosing a "clipless" pedal system | Steve Freides | General | 18 | May 20th 04 06:32 AM |
Taking photos while riding. | Hriv | Mountain Biking | 39 | October 3rd 03 02:58 AM |
Riding facing traffic | Bruce G Patrick | General | 4 | August 12th 03 08:11 AM |
Any DC area RBMers riding BikeDC? | Luigi de Guzman | General | 3 | August 9th 03 03:11 AM |