Hi,
I can't say exactly what the distance is for clearance but I can say thise with 140 or 160 mm disks have issues at times. Those with 180 or 203 mm disks do not have issues as the caliper is mounted far enough from the axle that it is not near the widest part of the motor.
Those with 140mm or 160mm disks that do have issues can normally solve them with small washers between the disk and the motor allowing the claper to be adjusted futher from the motor. Sometimes the caliper can be adjusted enough to clear or it also needs washers added to move it away.
Gary
