The Atlander Roverclaw 285/55R20 is a light-truck / SUV tire available in rugged terrain variants like A/T (All-Terrain) and M/T (Mud-Terrain).
It has a load range E (10-ply) and a load index of 122/119, meaning it's built to carry relatively heavy loads.
The speed rating depends on the variant: for the A/T model it's T (up to ~118 mph) , while for the M/T I variant it's Q (up to ~99 mph).
All-season: can handle dry, wet, and light snow (especially in the A/T version).
Off-road: good for loose terrain, dirt, and mud (especially the M/T variant).