Step 1: Mounting
The initial assembly requires a certain amount of force in your fingertips, but it’s still possible without a tyre lever. It’s hardly surprising, though. After all, which modern racing tyre comes with that magic self-mounting feature?
The 24 mm tyre width specified on the packaging is exactly what I measured after mounting them on my bc Flechtwerk carbon wheelset. That's how precision works. If you feel the 24 mm might be too narrow for you, then you can choose the wider 26 mm version.