Glossary: Class 7,8

Tuckster

Seasoned Expediter
Can someone describe the differences in classes of straight trucks. Is it strictly weight ?? Also a D or C truck.... & what is the favorite engine & HP.

Thanks
 

Moot

Veteran Expediter
Owner/Operator
A class 8 truck has a gross vehicle weight over 33,000 pounds.
A class 7 truck has a gross vehicle weight from 20,xxx to 33,000 pounds.

Class 8 trucks usually have larger cabs and a wider selection of engines, drive trains and axles. Most class 8 models can be spec'd with an O.E.M. sleeper.

Class 7 trucks usually have smaller cabs and have limited options for engines, drive trains and axles. Sleepers for most class 7 trucks come from after market suppliers.

An analogy can be drawn between class 7 and 8 trucks and 1/2 ton and 1 ton pickup trucks. A 1 ton pickup is designed for heavy duty applications. It can haul more weight and has more engine options than a 1/2 ton.

The letter designations used by expedite carriers refer to weight carrying capabiltiy and box size.

C unit- usually a 14-16 foot box and able to legally carry 3000 - 5000+ pounds.

D unit- usually a 20-24 foot box and able to leagally carry 12,000 to 13,000+ pounds.

These specifications vary from carrier to carrier. What I have listed are very general specs.
 

Moot

Veteran Expediter
Owner/Operator
Thanks Creacher. I tried to keep things in general terms. If Tuckster has specific questions, I'm sure others on here can answer them. It has been my observation that most expedite trucks are built on a class 7 platforms. Although the trend now may be toward a class 8. Serveral members on E.O. own and run class 8 trucks as C and D expedite units. LBD (Leo) and Ateam (Phil) come to mind. As with everything in life there is a trade off. Going with a class 8 will cost more initially and will probably be penalized in fuel economy. But it is available with more options, better warranties and should last longer than a class 7.
 
Top