I can't see how that would even remotely be possible, Shimano specifically brought out 4600/5600/6600/7800 as 10 speed, the shifters are however compatible with 9 speed derailleurs. Some people might confuse the fact there are 9 clicks but that indicates 10 speed specific.
I can't see how that would even remotely be possible, Shimano specifically brought out 4600/5600/6600/7800 as 10 speed, the shifters are however compatible with 9 speed derailleurs. Some people might confuse the fact there are 9 clicks but that indicates 10 speed specific.