IS Brake Caliper Home › Forum › Bike Forum › IS Brake Caliper Viewing 2 posts - 1 through 2 (of 2 total) IS Brake Caliper Mister PMember For it to be IS it would need to be in a certain position and the holes be a certain distance apart. But you are correct, IS bolts go across the back of the fork where as post mount go forward into the fork. Posted 7 years ago marcMember A very quick Q. Is a caliper International Standard just because it’s mounting bolts are parrallel to the wheel hub, or is there a bit more to it? Posted 7 years ago Viewing 2 posts - 1 through 2 (of 2 total) The topic ‘IS Brake Caliper’ is closed to new replies.