Bike Storage: Wall mounts, stands, lock-ups, sheds, etc.

I drilled 60mm deep,20mm diameter holes a couple of times, recently, to secure scaffold loops to provide secure bike locking points.
I used my own Bosch sds drill. It is notionally rated to 24mm into concrete, but I used a series of sds bits so as not to stress the mains electric motor: 6mm, 8mm, 12mm, 16mm, then 20mm.
Someone can do the maths, but this splits the volume to be removed (not equally), across the 5 drill bits.
Using this stepped approach, the drill bits almost pulled themselves into the hole, and there was easy and quick debris removal.

The concentration of the impact with a smaller diameter sds drill bit will sometimes penetrate a piece of aggregate in concrete whereas your 16mm drill bit could be ineffectively spinning on the aggregate surface.