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Firenze Screw Broke

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Firenze Screw Broke

Old 07-27-14, 02:46 PM
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CalebZ
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Firenze Screw Broke

Hey,

I bought an old Firenze bike at a local shop not too long ago. It's not in bad condition and I was enjoying riding it.
I'm not quite sure what all the parts are called, but I'll post pictures to hopefully help explain myself.
The left pedal was feeling loose and so I went to tighten one of the screws that holds it on. Unfortunately, the screw broke (I probably made it too tight for an old bike). I checked the local bike shops, and since this is a unique bike they don't carry the part I need. I checked online for it, but it seems to be very uncommon for a bike to use this kind of screw. I'm looking to see if anyone knows if there is anywhere online I can find this screw or if you have any other ideas as to how to fix the pedal.


Thank You in advance for any help
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Old 07-27-14, 02:56 PM
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The bolt that broke is not rare. It was yesterdays standard. It's called cotter pin.

Edit: And welcome to the forum!
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Old 07-27-14, 02:59 PM
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It is a cotter pin. Not unique, but definitely "old" for some bike shops

They come in several sizes and need to be filed for a good fit.

It is also recommended you use a cotter pin press to insert it.

If this is your first time, I would recommend calling a few bike shops to see if they have any cotter pin experience. You may not want to attempt putting in a new one yourself. If you do, check out Sheldon Brown for the correct technique.
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Old 07-27-14, 03:53 PM
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In the U.S. it's correctly called a cotter.

Cotter (pin) - Wikipedia, the free encyclopedia
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Old 07-27-14, 04:13 PM
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Thanks a bunch for the replies. I'm glad to know that it's difficult to install. I don't want to ruin anything else on the bike!
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Old 07-27-14, 04:38 PM
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Is there a way to figure out what size cotter pin to get?
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Old 07-27-14, 04:59 PM
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Originally Posted by CalebZ View Post
Is there a way to figure out what size cotter pin to get?
Get a calipers. Measure the diameter of the unthreaded portion in millimeters.
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Old 07-27-14, 06:07 PM
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Originally Posted by Chuckk View Post
If you go to a shop, take them with you.

They aren't hard to install.
+1 ^^

Without special tools, the OP is lucky that the old cotter is free of the crank.

Installing a new one is really quite easy for anyone familiar with wrenching on things.

If the new cotter fits in far enough to thread the nut, no filing of the cotter is needed and the tightening should be supplemented with hammer taps from the opposite end.
Continue to alternately tighten and hammer until the nut doesn't want to turn any more, and you're done. I would oil the cotter before insertion.

One more thing is that the crank arms need to be 180 degrees apart exactly, to keep pedaling smooth, so be sure that the right and left cotters point in opposite directions(!), or the crankarms will end up positioned not exactly at 180 degrees apart, and the bike won't pedal smoothly at all.

Lastly, pay attention to sliding the crank onto the spindle so the end of the spindle is flush with the crank arm. This gives you the best chance of not having to grossly re-adjust the front derailer's travel limit screws, which still may need some attention later of the shifting is slow, noisy or tosses the chain off the sprockets.
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