What is a durometer rating?
A durometer, also called a Shore durometer, is a standard tool for measuring how hard materials like rubber and plastics are. The scale goes from 0 to 100, but there is no actual unit called a durometer.
Durometer numbers let you compare the hardness of similar materials, as long as they are measured with the same scale and device. A higher durometer number means the material is harder.
Shore hardness, or durometer, refers to a set of international standards for measuring hardness. Shore durometers are devices that use specific, standard methods to measure hardness. These standards make it easy for anyone to compare the hardness of different materials.
The image above shows a simple version of a durometer hardness test. The arrows show the force the durometer applies to the material.
There are important differences between the two indenter tip shapes. Type A indenters have a 35 ° cone angle and a flat tip 0.79 mm wide. Type D indenters have a 30-degree cone angle and a sharper, rounded tip that is 0.1 mm wide. using a standardized pressure foot or indenter.
When we refer to Durometer ratings in product specs for any Valor Offroad tire, we always use Type A Durometer.
When we list durometer ratings for Valor Offroad tires, we always use a Type A durometer.
| Performance tire | 55 | A |
| Automotive tire | 70 | A |
| Soft skateboard wheels | 78 | A |
| Hydraulic O-ring | 70–90 | A |
| Pneumatic O-ring | 65–75 | A |
| Hard skateboard wheels | 98 | A |
| Hard hat (HDPE) | 75 | D |
| Cast urethane plastic | 80 | D |
