Yes. Each trailer comes with a spare tire. The standard spare is going to come with the unit regardless of the package. However, you can upgrade to a full-size, matching Boondock spare tire with the TAB 320 S and CS-S and TAG and TAG XL when you order the unit. This tire does not mount under the the unit. It has to be mounted on the front tongue in the generator tray. 

The TAB 400 does not have the option for the matching Boondock spare tire. 

The standard spare tire is going to be mounted on a white steel rim. 

Spare tire sizes

TAG and TAG XL: 13"

TAB 320 S and CS-S: 14"

TAB 400: 15"

All matching Boondock spare tires are 15"