FMVSS 120

Tire Selection and Rims for Motor Vehicles with a GVWR of more than 4,536 kg (10,000 lbs.)

This Standard applies to MPVs, trucks, buses, trailers, and to rims and non-pneumatic spare tire assemblies for use on those vehicles. It specifies tire and rim selection requirements and rim marking
requirements. Tire size(s), rim designation and cold inflation pressure must be shown on either the certification label or on a separate tire information label.

Applicability:

Trucks & MPVs 10,000 GVWR or Less No
Trucks More than 10,000 GVWR Yes
Buses 10,000 GVWR or Less No
Buses More than 10,000 GVWR Yes
Trailers Yes

Read the Complete Standard