I have a complete 105 series FC- 5600 standard double crankset that is in excellent condition, but not in use.
I have found a used Ultegra FC-6603 triple crankset with a stripped pedal thread on the non-drive side arm. The drive side of the crank looks very good. I need a triple for my next build project.
Both cranks are a 175mm size.
Will the 105 non-drive side arm install correctly on the Ultegra crank?