| Property |
Test Method |
Description of Test Property |
General Influence on
Tires and Wheels |
Hardness Shore A
|
ASTM D2240
|
Measures the pentration
of a specified indenter forced into a material under
specified conditions
|
Load capacity, ride, comfort, traction,
braking
|
| Tensile Strength |
ASTM D412 |
Measures the force required to break a given test
specimen divided by the cross-sectional area of
the unstretched specimen |
General material strength in tension |
| Elongation |
ASTM D412 |
Measures the amount of distance traveled to the
break point relative to the original bench mask
length |
General material elaticity characteristics |
| 100% Modulus |
ASTM D412 |
Measures the observed force at 100% elongation
divided by the cross-sectional area on teh unstretched
specimen |
Material strength when small strains are applied |
| 300% Modulus |
ASTM D624 |
Measures the observed force at 300% elongation
divided by the cross-sectional area on teh unstretched
specimen |
Material strength when large strains area pplied.
This measurement is less applicable at room temperature |
| Tear Die C |
ASTM D470 |
Measures the force required to tear a die C (90
deg. Angle) specimen divided by the thickness |
Resistance of a tear initiating due to floor debris,
dock plates, etc. |
| Tear Split |
ASTM D395
Menthol B |
Measures the force required to prpagat a tear
using a trouser-type specimen |
Resistance of a tear propagating once an initial
cut has been made in a wheel |
| Compression Set |
ASTM D395
Menthol B |
Measures the force required to prpagat a tear
using a trouser-type specimen |
Flat spotting a tire |
| Bayshore Resiliency |
ASTM D2632 |
Measures the resulting permanent deformation of
a given specimen under a constant deflection in
air at a given temperature |
Rolling resistance, hysteresis |
| Texus Flex |
***** |
Measures the number of cycles required to initiate
a crack in a given test specimen that is being subjected
to a continuous cyclical deflection4 |
Flex life, cut / tear potential |
