On 22/05/2019 22:49, AK wrote:
It was suggested that I go to a cartridge type of crank bearings when
my "old school ones" wear out.
Does the new type last longer?
I was told it takes special tools for those?
Ime they will last a lot longer, maybe 50% more, and require less
maintenance as well. On the down side, when they do go, you replace the
unit, but since even a good one is ~15USD I wouldn't sweat that.
You'll need a bottom bracket removal tool, basically a splined socket,
5-10 USD.
You will need to measure the dimensions of the old one before ordering a
new one, it can look confusing but you need to know thread type, and widths.
See
https://www.sheldonbrown.com/tooltips/cartridge.html
Imho, stick to the Shimano ones, cheap, last forever.