I have no idea, will speak to Maxxis though. I don't mind but they don't print what compound they are on the sidewalls of these, and I want to make sure I haven't been given 60A's. or 1 60A. I hate hard compounds with a grudge.
Doesn't need to be . Mine are toobliss setup and solid. Best - tyres - ever, to seat! Tube first to seat one side, remove tube, install valve/strip, pump. Not a fast pump, just causally inflate it like you would a tube and the stance of the tire as it is from factory just lifts it into the bead and locks.