For some insane reason new class C do not come with a spare tire.
I noticed that when I was shopping for MH's . I found the Sunseeker on an E450 had a spare under the rear in the area of the hitch.
My class C has the Hankooks , at 12,000 miles, no problems / good wear.
Just to try something else, when it comes time to swap them for new tires I was thinking of trying the new Goodyear Adventure Kevlar E rated tires. They are a more aggressive A/T tread but many people have said they are very quiet, ride smooth and wear well. I think they also carry the 'winter snowflake seal'.
