Originally Posted by
john m flores
I'm no expert, but I'd imagine that going from square taper to Hollowtech will push the chainrings away from the frame, and thus reduce any interference between the drivetrain and the frame. But it will also affect the chainline, which is more critical in folders with shorter-than-normal chainstays.
I'm curious: Why is that?
Am I correct in understanding that MTBs usually use a 73mm BB shell while road bikes usually come with 68mm shells, which is why hollowtech BBs sometimes/often come with 5mm worth of spacers?