Understanding Durometer Readings
Durometer is one of several measures of the hardness of a material. Higher numbers indicate harder materials; lower numbers indicate softer materials.
Hardness may be defined as a material’s resistance to indentation. The durometer scale was defined by Albert Ferdinand Shore, who developed a device to measure Shore hardness in the 1920s. The term durometer is often used to refer to the measurement as well as the instrument itself. Durometer is typically used as a measure of hardness in polymers, elastomers, and rubbers.
Shore’s device was not the first hardness tester nor the first to be called a durometer (ISV duro- and -meter; attested since the 19th century), but today that name usually refers to Shore hardness (other devices are simply called hardness testers).
sooooo, let’s boil down what these means to you, a tire consumer and why durometer readings are incredibly important to engineering tires specific to unique terrains, vehicles, load ratings and air pressue (psi). To make things easy, a reading of 1 is extremely soft, 100 would be extremely hard.
The term “Durometer” means both the measuring tool, and the unit of measurement. You use a durometer to check the tires durometer. Generally speaking, a low durometer tire will stick better, and give better traction. But it wears out faster. As a tire heat cycles and wears out, the durometer rises.
The durometer is extremely heat dependent. As tire compound (rubber) raises in temperature, it becomes sticky. This is important to consider because checking the durometer readings of your cold tires in your garage more than likely will not alter the readings. Checking your tire durometer readings directly after use or in direct sunlight in temperatures over 70 degrees may affect your readings. Trust-worthy tire manufacturers will openly supply durometer readings however all technical specs are based on cold compounds in temperature controlled environments.
EFX TIRES – DUROMETER SPECS
STYLE | PART NUMBER | SIZE | Durometer range |
BLADE | FA-807 | 22X11-10 4PR | 68±3 |
BLADE | FA-806 | 23X10.50-12 4PR | 68±3 |
BLADE | FA-817 | 23X10R14 4PR | 68±3 |
FUSION S/T | FA-827 | 205/30-12 4PR | 68±3 |
FUSION S/T | FA-826 | 205/30-14 4PR | 68±3 |
FUSION S/T | FA-825 | 23X9.50R12 6PR | 65±3 |
HAMMER | FA-828 | 22X9.50-10 4PR | 68±3 |
HAMMER | FA-829 | 23X9.50-12 4PR | 68±3 |
HAMMER | FA-830 | 23X9.50-14 4PR | 68±3 |
HAMMER | FA-831 | 22*9.50-12 4PR | 68±3 |
LO-PRO | FA-812 | 225/35-12 4PR | 68±3 |
MOTO350 | W-25-8-12 | 25X8-12 6PR | 65±3 |
MOTO350 | W-25-10-12 | 25X10-12 6PR | 65±3 |
MOTOBOSS | MB-28-10-14 | 28*10.00-14 6PR | 65±3 |
MOTOBOSS | MB-30-10-14 | 30*10.00-14 6PR | 65±3 |
MOTOBOSS | MB-32-10-15 | 32*10.00-15 6PR | 65±3 |
MOTOBOSS | MB-34-10-16 | 34*10.00-16 6PR | 65±3 |
MOTOCLAW | MC-26-9-12 | 26X9.00-12 6PR | 65±3 |
MOTOCLAW | MC-26-11-12 | 26X11.00-12 6PR | 65±3 |
MOTOCLAW | MC-29-10-16 | 29X10.00-16 6PR | 65±3 |
MOTOCLAW | MC-27-10R-14 | 27*10R14 8PR | 65±3 |
MOTOCLAW | MC-30-10R-14 | 30*10R14 8PR | 65±3 |
MOTOCLAW | MC-28-9R-15 | 28X9R15 8PR | 65±3 |
MOTOCLAW | MC-28-11R-15 | 28X11R15 8PR | 65±3 |
MOTOCLAW | MC-32-10-16 | 32X10R16 8PR | 65±3 |
MOTOCLAW | MC-33-10-18 | 33X10R18 8PR | 65±3 |
MOTOCLAW | MC-32-10-14 | 32X10R14 8PR | 65±3 |
MOTOCLAW | MC-31-10-15 | 31X10R15 8PR | 65±3 |
MOTOCLAW | MC-28-10-14 | 28X10R14 8PR | 65±3 |
MOTOFORCE | MF-25-8-12 | 25*8-12 6PR | 65±3 |
MOTOFORCE | MF-25-10-12 | 25*10-12 6PR | 65±3 |
MOTOFORCE | MF-26-8-14 | 26*8-14 6PR | 65±3 |
MOTOFORCE | MF-26-10-14 | 26*10-14 6PR | 65±3 |
MOTOFORCE | MF-24-8-12 | 24*8-12 6PR | 68±3 |
MOTOFORCE | MF-24-10-12 | 24*10-12 6PR | 68±3 |
MOTOGRIP | MG-26-9R-14 | 26X9.00R14 8PR | 65±3 |
MOTOGRIP | MG-26-11R-14 | 26X11.00R14 8PR | 65±3 |
MOTOGRIP | MG-26-9R-15 | 26X9.00R15 8PR | 65±3 |
MOTOGRIP | MG-26-11R-15 | 26X11.00R15 8PR | 65±3 |
MOTOGRIP | MG-28-9R-14 | 28*9R14 8PR | 65±3 |
MOTOGRIP | MG-28-11R-14 | 28x11R14 8PR | 65±3 |
MOTOHAMMER | MH-27-9R-14 | 27X9R14 8PR | 65±3 |
MOTOHAMMER | MH-27-11R-14 | 27X11R14 8PR | 65±3 |
MOTOHAMMER | MH-28-10R-14 | 28*10R14 8PR | 68±3 |
MOTOHAMMER | MH-31-10R-14 | 31X10R14 8PR | 65±3 |
MOTOHAMMER | MH-30-10R-15 | 30X10R15 8PR | 65±3 |
MOTOHAMMER | MH-30-10-14 | 30X10R14 8PR | 65±3 |
MOTOHAMMER | MH-32-10-15 | 32X10R15 8PR | 65±3 |
MOTOHAMMER | MH-32-10-16 | 32X10R16 8PR | 65±3 |
MOTOMAX | MM-27-10-14 | 27X10-14 6PR | 65±3 |
MOTOMAX | MM-27-12-14 | 27X12-14 6PR | 65±3 |
MOTOMONSTER | M-30-10-14 | 30X10-14 6PR | 65±3 |
MOTOMTC | W-26-9-12 | 26X9-12 6PR | 65±3 |
MOTOMTC | W-26-11-12 | 26X11-12 6PR | 65±3 |
MOTOMTC | W-26-9-14 | 26x9-14 6PR | 65±3 |
MOTOMTC | W-26-11-14 | 26x11-14 6PR | 65±3 |
MOTOMTC | W-28-10-14 | 28X10-14 6PR | 65±3 |
MOTOMTC | W-28-10-15 | 28X10-15 6PR | 65±3 |
MOTOMTC | W-30-10-14 | 30X10-14 6PR | 65±3 |
MOTOMTC | W-30-10-16 | 30x10-16 6PR | 65±3 |
MOTOMTC | W-32-10-18 | 32X10-18 6PR | 65±3 |
MOTOMTC | W-27-10-14 | 27x10-14 8PR | 65±3 |
MOTOVATOR | MV-30-95-16 | 30×9.5R16 8PR | 70±3 |
MOTOVATOR | MV-30-95-15 | 30×9.5R15 8PR | 70±3 |
MOTOVATOR | MV-30-95-14 | 30×9.5R14 8PR | 70±3 |
MOTOVATOR | MV-28-95-14 | 28×9.5R14 8PR | 70±3 |
PRO-RIDER | FA-811 | 205/50-10 4PR | 68±3 |
PRO-RIDER | FA-814 | 215/50-12 4PR | 68±3 |
PRO-RIDER | FA-821 | 215/65R10 4PR | 68±3 |
PRO-RIDER | FA-824 | 18x8.50-8 4PR | 65±3 |
SANDSLINGER | SS-27-10-14 | 27X10.00-14 4PR | 73±3 |
SANDSLINGER | SS-27-13-14 | 27X13.00-14 4PR | 73±3 |
SANDSLINGER | SS-29-14-14 | 29X14-14 4PR | 73±3 |
SANDSLINGER | SS-29-11-14 | 29X11-14 4PR | 73±3 |