Class V: Internal Combustion Engine Trucks (Pneumatic Tires) Sean M. November 06, 2015 21:18 Follow The following are examples of Class V powered industrial trucks. Lift Code 4 Fork, Counterbalanced (Pneumatic Tire). Related articles Class IV: Internal Combustion Engine Forklifts (Solid/Cushion Tires) Where is TruPar.com located? How do I get help finding part numbers? Class VI: Electric and Internal Combustion Engine Tractors Comments 0 comments Article is closed for comments.