Hummvee split rims
there are a few different Hummer/ Humvee/ HMMWV wheel types out there. The most interesting are the military and very early civilan steel split rims. the military versions came with highly desirable magnesium runflats that also serve to lock both beads. there are two basic types of these split rims - one with 8 bolts that hold the rim together for bias ply tires, and a 12 bolt version that will work with radials.
16.5" x 9-7/8"
8 on 6.5" bolt pattern
7" backspacing - it's relatively common to modify this, or to run large spacers.
the runflat stands 24" tall