The radially mounted brake only needs spacers to change disc size. This makes for simple disc size changes as opposed to the current post mount which varies in position with different disc sizes.
As our brake designer comments “It is really frustrating to model things perfectly on the screen, have CNC machines capable to hold very tight tolerances, to then fit a caliper and some randomly dimensioned brake mount. When you go away from the standard 160 postmount dimension depending which manufacturer spec you go for, the caliper ends up in a different position because there is no set standard.”
Radial mounted calipers aren’t new and have been used on motorbikes for decades, our old Mono6-Ti caliper used this type of mount.