Italeri Peterbilt 377A question

[suprafastcelica]

I bought a Italeri Peterbilt 377A/E kit.  i was told it is missing a front rim. once i got looking at kit i kind of question if it is or not.  I see 4 chrome rims for the rear, 2 chrome front rims, and 1 grey molded rim (looks like a front) that is of the tree. what is that gray rim for? i believe all the inner rears are all accounted for. 

[plastic trucker]

If it's got holes drilled in it where the lug nuts go, then it's for the spare tire.

[suprafastcelica]

Thank you!, i thought that but want sure about that.