On a couple of more recent boost frames, I've been extremely limited by how much I can in-board my chainring mainly due to chainstay clearance. I aim for center alignment on my 3rd or 4th cog, run a 28t 64bcd narrow wide ring mounted to a 2x specific Shimano crank and I have to do some considerable shimming to get 1-2mm chainstay clearance, and I'm pretty sure Shimano would not approve how much crank axle the non drive arm is hanging onto.
March 5, 2023, 8:15 p.m. - UFO
On a couple of more recent boost frames, I've been extremely limited by how much I can in-board my chainring mainly due to chainstay clearance. I aim for center alignment on my 3rd or 4th cog, run a 28t 64bcd narrow wide ring mounted to a 2x specific Shimano crank and I have to do some considerable shimming to get 1-2mm chainstay clearance, and I'm pretty sure Shimano would not approve how much crank axle the non drive arm is hanging onto.