Interloc Racing 12-40 casette

Anyone tried InterlocRacing 9 speed 12-40t ROAD Casette on a fatbike!

How is the shifting on larger cogs. Steps seem high. It is 12-13-15-17-21-25-28-34-40

Are they strong enough for Fatbikes (and i am heavy). I am not familiar with difference between MTB and road casettes

I am not...