Shimano saint m820 disc brake caliper the new saint disc brake embraces shimano ice technology and advances it reducing heat and improving performance through multiple combined features in addition to finned brake pads self insulating ceramic pistons new m820 disc brake systems will also see the introduction of a 30mm aluminum banjo fitting a new longer 30mm banjo fitting extending from the caliper further reduces heat at a critical location where oil transitions from hose to caliper saint