Rubber Materials

What is Freight Class?

Freight class is a standard classification system for shipments, defined by the National Motor Freight Traffic Association (NMFTA). It's used to categorize commodities like Rubber Materials for transport, taking into account factors like weight, dimensions, density, storage capability, ease of handling, and liability. Freight class is a system to categorize different types of goods being shipped.

How to determine Freight Class

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Density is a key concept in freight shipping, as it significantly impacts the freight class for commodities like Rubber Materials and hence, the shipping cost. It is calculated as the weight of the shipment divided by its volume. Density is an important factor in determining the cost of freight shipping.

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Stowability is used in freight shipping to describe how easily an item can be stowed or stored in relation to other items. For example, when trying to understand stowability for Rubber Materials, it is important to know if the item can be packaged efficiently and stowed onto the truck easily. In other words- Stowability is the characteristic of a shipment that determines how easily it can be stored.

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Liability is a term used to refer to the accountability or risk involved in transporting Rubber Materials. It's one of the factors considered when determining freight class. It's the potential risk of loss or damage during the transportation process.

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Handling refers to the procedures and precautions taken when moving and storing Rubber Materials. It is one of the factors considered when determining freight class for Rubber Materials. Handling is the steps taken to move and store goods during transportation.

Freight Class Commodities


Rubber Materials Rubber


Reclaimed, dispersed, liquid or paste, in drums or pails.

Common Commodity Items



For many NMFC® codes there isn’t just one single class that is applied. Often, NMFC® numbers have multiple "sub-classes", which are almost always based on the density of the shipment. In the instance where your NMFC® number has multiple sub classes, it's best to contact an expert, like Koho, to help identify which subclass to use.


What are the NMFC codes?

Created and maintained by a nonprofit organization called the National Motor Freight Traffic Association (NMFTA), National Motor Freight Classification (NMFC) is a classification system used for interstate, intrastate, and foreign commerce movement of LTL shipments. You can learn more on our freight classes pages.

Can I use a lower NMFC class to save money on shipping?

No. If you claim that your freight is a lower class than it actually is, your carrier will likely find out. They will charge you a fee for reclassifying the freight and charge you the appropriate amount for the actual class of your freight after it has been shipped.