I have a bad left side crank arm and can't find an exact replacement. I currently have a FSA ISIS Alpha Drive crankset, but can only find a Truvativ ISIS left crank arm replacement. They are the same lengths, will this be ok?
My other option is to upgrade to better crankset/bb, but I'm in a bit of a rush with a big mtb trip rapidly approaching and I'm afraid I won't have time to install an entirely new crankset/bb in time.
The left crank arm replacement seems like the quickest fix.
All help is greatly appreciated.