Left pedal won't go back in?

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Levo-Lon

Guru
A pedal that falls off after a few days has been fitted incorrectly. If the threads are damaged then whoever fitted it initially cross threaded it. It is down to the shop to sort it for you, which I think they'll do without quibbling.


Indeed, just about every bike ive bought with pedals fitted were lose when i got the bike home.
For some reason this Very important pdi check seems to get missed??

Then you find that the stem is out and those bolts are so over tight there close to stripping!!
Watched a young lad in Halfords the other day over tighten a stem then yank and twist the key out so it rounded the allan bolt a treat, so the next person has a ffs moment.

Does one's head in if your the lucky recipient:cursing:

Pretty sure your crank pedal thread is done OP ,be a new arm im afraid.
 
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Deleted member 26715

Guest
Indeed, just about every bike ive bought with pedals fitted were lose when i got the bike home.
For some reason this Very important pdi check seems to get missed??.
But they 'should' self tighten, hence why they are different threads each side
 

rrarider

Veteran
Location
Liverpool
As many bikes are transported with the handlebars turned through 90° and the pedals removed, I'm wondering what would have happened if the 'mechanic' at the bike shop had tried to fit the right hand pedal to the left crank? I'm finding it hard to visualise the damage that might be caused, if any, trying to tighten a right handed thread spindle into a left hand threaded crank.
 

Ian H

Ancient randonneur
But they 'should' self tighten, hence why they are different threads each side
That is supposed to prevent loosening, but won't work if the pedal is already loose.

There is another reason for the handed threads: if a pedal seizes, it unscrews instead of breaking your ankle, more important on fixed-wheel machines such as track bikes. (Yes, I have seen it happen, when the bearings disintegrated).
 
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Deleted member 26715

Guest
That is supposed to prevent loosening, but won't work if the pedal is already loose.

There is another reason for the handed threads: if a pedal seizes, it unscrews instead of breaking your ankle, more important on fixed-wheel machines such as track bikes. (Yes, I have seen it happen, when the bearings disintegrated).
Never thought of it that way, Thanks
 
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Deleted member 26715

Guest
Pedal or crank?
 

Levo-Lon

Guru
[QUOTE 5348231, member: 9609"]the way threads weld themselves in place with corrosion, I somehow think your leg would snap off before your foot would loosened the pedal[/QUOTE]

Rust?
You been at everything with that bloody Gorilla Glue haven't you!!
 

Ian H

Ancient randonneur
[QUOTE 5348231, member: 9609"]the way threads weld themselves in place with corrosion, I somehow think your leg would snap off before your foot would loosened the pedal[/QUOTE]

I'd like to think that most people would add a touch of grease before assembling components.
 
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