How do dual 48.8/51.8 FDs do the 3mm offset?
Some Shimano FDs advertise themselves as dual chainline compatible: 48.8 mm for 142 mm O.L.D. and 51.8 mm for 148 mm O.L.D.
Just curious as how the 3 mm offset is done. For example, the SLX FD-M7100 are all dual chainline compatible.
TYIA.
Just curious as how the 3 mm offset is done. For example, the SLX FD-M7100 are all dual chainline compatible.
TYIA.