Simple Ultegra triple to double conversion question.
I feel kinda silly asking because I've worked in shops for a while, I just kinda specialized in high end MTB stuff and didn't pay too much attention to road tech.
Is there a fundamental difference between 9sp triple and double cranks other than the extra drilling for the granny?
I ride a double 9sp ultegra setup right now. Can I buy a used triple crankset, remove the granny, and use it as a double with a 109.5mm octalink? I'm trying to experiment with arm length. Thanks.