SAFETY: Hookless rims are safe only within a specific pressure range. Many users are still unaware of this pressure range and tend to over-inflate their tyres. Hooked rims guarantee the maximum level of safety even if the inflation pressure is exceeded.

...... with the same sized rim channel and tyre, the change in the profile of the tyre is so INSIGNIFICANT that it has NO EFFECT on aerodynamics, rolling resistance, reactivity and comfort.
— Fulcrum Wheels "HOOKED VS. HOOKLESS"