Bottom Bracket Question

Just so that you know, and you don't just say, "Why don't
you upgrade the bottom bracket now?!" The answer is that
budget constraints prohibit me from doing so. (Can you guess
where my money went?)

- Noel

N. D. Muscutt said:

I am upgrading almost all of the components on my bike to
XT stuff. I got a new XT crankset and am wondering if I
can use the crankset with my old bottom bracket. The old
bottom bracket is an old thing from about 1997. Any
input? Thanks.

- Noel

N. D. Muscutt said:

Just so that you know, and you don't just say, "Why don't
you upgrade the bottom bracket now?!" The answer is that
budget constraints prohibit me from doing so. (Can you
guess where my money went?)

The rear hub? If you're constrained by your budget, why not
use LX rather than XT?

Current XT cranks / BB use a mating interface called
'Octalink'. This is a round spindle with notches in it. If
you look at your old BB, you'll notice it's square. As
you've probably now gathered, these systems aren't
compatible.

--
a.m-b FAQ: j-harris.netambfaq.htmOpen ↗

b.bmx FAQ: t-online.debmx faq.htmOpen ↗

N. D. Muscutt said...

Quoted message said:

I am upgrading almost all of the components on my bike to
XT stuff. I got a new XT crankset and am wondering if I
can use the crankset with my old bottom bracket. The old
bottom bracket is an old thing from about 1997. Any
input? Thanks.

- Noel

Nope, you can't do it. If you have XT cranks you need the
ES-71 bottom bracket. You'll have to scrape together the
$30+ for the BB, or you can't use your cranks.