Bottom (bracket) questions

Mozza1

1.How many miles will an Ultegra Octalink BB last say, in dry conditions (odd shower excepted)
2.How do you know when the BB is worn?
Is there play if you rock the cranks from side to side?
3.Does the Dura Ace BB work with the Ultegra Chainset?
I’ve got a suspicion that DA BB 's & chainsets only work together.

nicklouse

2 remove chain and spin the cranks at speed you will feel it.

3 they use the same V1 splines.

http://www.sheldonbrown.com/gloss_u-v.html#v1

for

# Dura-Ace (BB-7700 9speed)
# Ultegra (BB-6500 9-speed)

Mozza1

Thanks nicklouse