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Rubber wheels physical characteristics

Characteristics of Roll-Tech's solid rubber tire product line
Tire Material Solid black rubber, compression-molded from blend of  granulated (crumb)  rubber recycled from used car and truck tires.
Technical characteristics Hardness:  75 - 80 Shore A
Abrasion:  250 - 300 mm3
Density:  1.14
Operating temperature Continous: -22°F to +176°F / -30°C to +80°C
Intermitent:  -40°F to +212°F / -40°C to +100°C
CHEMICAL RESISTANCE Water (68°F) Excellent
Saturated Steam Excellent
Weak Acids Excellent
Weak Bases Excellent
Abrasion Good
Strong Acids Good
Strong Bases Good
Alcohol Good
Hydrocarbons Not Recommended
Acetone Not Recommended
Aromatic Solvents & Chlorides Not Recommended
Operating Chracteristics:  Puncture proof, quiet rolling, cushioned, resilient, excellent life expectancy, low starting effort under load on uneven floors.