Originally Posted by
j mazz
after 4 years and maybe 3,500 miles i was told the bottom bracket needs replacing, i don't doubt them but i thought they were sealed? water and sand, dirt etc in there.
How long should they last? For me, 41 years to date for the 'unsealed' Sugino BB on my Gitane. Cups are still good. I had to replace the spindle a few years back because it just plain wore out. Balls have been replaced a few times. Yearly overhauls.