A class A license is considered the “universal” CDL, providing the opportunity to drive multiple types of commercial trucks and tractor trailers. Gross Combined Weight Rating (GCWR) of 26,001or more AND Gross Vehicle Weight Rating (GVWR) of the Trailer (Towed Unit) is 10,001 or more pounds.
Class B CDL - any vehicle with a GVWR - Gross Vehicle Weight Rating greater than 26,000 pounds, as well as any vehicle towing a trailer that does not exceed a GVWR of 10,000 pounds. A Class B CDL is required for: drivers towing trailers with less than 10,000 pounds of GVWR.