Originally Posted by
BlazingPedals
Are we talking about 5-bolt crank arms? Not sure what BCD is used on current Shimano proprietary 4-bolt arms. Although I'm sure that many people here can educate me.
It is a 110bcd variant but a proprietary 4 arm version. However in the case of these there are plenty of aftermarket options. I don't know if things have changed on the newest of Shimano, I think for MTB stuff it is the direct mount model like SRAM, Race Face... have done.