102" here (18" short of 10') on a 5 ton SS and chains on each corner.
So much depends on snow consistency and your use. That "use" would be commercially clearing a parking lots continuously after a certain depth or accumulation or a more residential, end of snow clearing.
Obviously it's better to "plow with the storm" as Fisher plows old saying said, but I find most snows here of any respectable depths (18-20") are usually a dry consistency and plow/push easily with the above machine.
Weight, inertia and traction, are your friends with a pusher box particularly with longer parking lot runs.