Ok, I currently have a TruVativ Elita triple with ISIS bottom bracket. The left crankarm keeps coming loose so I want to replace the crank. I have a 9 speed with Shimano 105 front deraileur and ultegra rear. I can pick up an inexpensive 105 triple crank, (5505) for less than $100. What bottom bracket do I need for this? I was thinking of going with an Ultegra crank but I didn't want to change anything else. I just want a decent 9 speed crank that won't fail me.
I see a 5500 bottom bracket online for around $35 but it doesn't look like it has the outboard bearing cups like my current setup??
Thanks for your help.