I'm looking to put longer and stronger crankarms on my commuter bike.
It has a full dura-ace 9spd group on it with the exception of the crank/BB. Currently I have a shimano un54 square taper sealed bottom bracket in it iirc (it's a sealed cartridge shimano I know for sure, but it's been a couple years, it originally had the old style cup/cone floating bearing BB). And a sugino mighty crankset.
Recently I've been getting a rhythmic clicking when I apply power with my right leg, and if I ever put down a lot of power to pedal up hills I can see the chainrings flex around and lots of funny noises happen. In addition the cranks are 172mm and I'm 6'5" and would like to try longer crankarms.
So the short version is: What would be a good upgrade, can I put an octolink BB in with a matching crankset, or even BB30? I like the idea of the stiffest possible BB setup, I would also like a compact double set of chainrings, like 36/52. My current 42/52 isn't very useful with my 9spd cassette which I think only goes up to 23t.