Originally Posted by
AeroGut
The 7700 and 5500 both use octalink v1 spindles so the 118 5500 should work fine with your crank. And you’re right, there really aren’t any octalink options between 109 and 118. Make sure, though, that your FD has enough reach to shift with the longer spindle.
Another option would be going smaller on the inner chainring unless you’re already as small as you can go, which I think is 38 for that crank.
38 T is the smallest ring for 130 bcd and that is what I have on the 7700. I did not even think of checking the reach on the front derailleur. I will check it but am pretty sure it will be ok since I had to shorten the travel when I first tried the 7700. I bought this bike used, and while I am working on it, I am going to install new gear and brake cables. I am also going to upgrade the old Sora FD with a new 5700 that I had bought and never used.