Originally Posted by
zhan7240
Hi, I'm thinking of getting the ultegra 6600 165mm cranks, which is 10-speed. I currently have the 6500 9-speed cranks and what I assume to be 6500 BB (I can't actually see the part number). Would the 6500 BB work with the 6600 cranks? Thanks in advance.
No. 6500 uses an Octalink bottom bracket. You will have to buy the outboard bearing cups which will add about $30 to the cost. I just did that very same switch out Saturday.....