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Aug 28, 2015 at 7:47 comment added user21321 Hmm. My experience of square-taper internal BB (usually UN54) is that they lasted about 10 000 miles before starting to wear and get noisy. External bearing BB (Tiagra) last about 5000 miles and fail very suddenly, with the first symptom being 'wobbly' cranks. I'm on the third BB on a bike from new; the bike has done about 11 000 miles.
Aug 24, 2015 at 16:55 review Late answers
Aug 24, 2015 at 21:34
Aug 24, 2015 at 16:35 review First posts
Aug 25, 2015 at 0:34
Aug 24, 2015 at 16:30 history answered Winston CC BY-SA 3.0