UN55 Bottom Bracket
09-06-20, 02:10 PM
#1
Junior Member
Thread Starter
UN55 Bottom Bracket
Is it possible to damage a cartridge style BB by over torquing a crank arm? I am hearing and feeling in my feet a clicking noise only when I pedal and in either chainring or any cog.
09-06-20, 03:02 PM
#3
Really Old Senior Member
I could imagine over torquing a SQ. taper arm "could possibly" crack the square hole.
OR
Did you feel the bolt start to "give"?
OR
Did you feel the bolt start to "give"?
09-06-20, 04:00 PM
#4
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Those are pretty robust bottom brackets, so I doubt you could damage them.
Clicks and squeaks are annoying but try the "cheap" fixes first, like checking the chain ring bolts or swap out the pedals if you have a second set.
Although this is a point of great debate, I usually grease the tapered interface on the BBs.
Clicks and squeaks are annoying but try the "cheap" fixes first, like checking the chain ring bolts or swap out the pedals if you have a second set.
Although this is a point of great debate, I usually grease the tapered interface on the BBs.
09-06-20, 04:14 PM
#5
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Just like any other clicks and things you hear, you need to track them down. Eliminate other possibilities when able.
Imagining while somewhat helpful, can lead you to focus too much on possibly the wrong thing.
Imagining while somewhat helpful, can lead you to focus too much on possibly the wrong thing.
09-06-20, 06:43 PM
#7
Senior Member
Is yours a 73mm X 122.5, by any chance? I have an extra one around (new) if you can't find it anywhere.
I found that, when I first changed my BB-UN55 a few months ago, I had that same click. It turned out my crank was LOOSE, not over-tight. Once I gave it a turn with the ratchet, the noise went away and never returned.
I found that, when I first changed my BB-UN55 a few months ago, I had that same click. It turned out my crank was LOOSE, not over-tight. Once I gave it a turn with the ratchet, the noise went away and never returned.
09-07-20, 01:49 PM
#8
Junior Member
Thread Starter
Thanks again all, this morning on a ride my bike was really making noises, even a squeak. At a stop, I jumped up and down on each pedal and all quiet until I grabbed the brakes and begun to rock forward and back. It’s then I realized the noise was coming from the headset. I went home and adjusted same......all quiet once again!
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09-07-20, 06:41 PM
#10
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It was never MY bottom bracket!😁
09-08-20, 02:49 PM
#11
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Originally Posted by lhill
Thanks again all, this morning on a ride my bike was really making noises, even a squeak. At a stop, I jumped up and down on each pedal and all quiet until I grabbed the brakes and begun to rock forward and back. It’s then I realized the noise was coming from the headset. I went home and adjusted same......all quiet once again!
Nothing more satisfying than finding the culprit!
09-08-20, 04:54 PM
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Love a happy ending
