12S lipo is 12*4.2 or 50.4V — do not pay attention to the “nominal voltages” which are essentially lies, but more specifically, just names.
60V is the absolute limit and you cannot operate at 60V because driving the motors causes inductive voltage spikes and you won’t have any margin of safety.
These numbers mean very little — if anything at all. The higher they type them, the more shit they sell. What do you think they’re going to do?
Also, motor parts aren’t necessarily limited by power. They are limited by temperature. The maximum temperatures could be achieved at low or high power levels…
I really, really hope you already completed steps 1 - 3
Flipsky has little to no quality control, and you get what you pay for. When you buy cheap, you buy twice.