Tire Material	Natural Rubber	Polybutadiene Rubber	Polybutadiene High-Rebound Rubber	Polybutadiene Red Rubber
Model Number of Wheel	-	S・ PN・ PNA・ PND・ RG・ H・ PC	SH	SR
Hardness	HS80	HS65	HS65	HS60
Elasticity	Good	Excellent	Excellent	Excellent
Compression Set	Good	Good	Good	Good
Wear-resistance	Good	Very Good	Very Good	Very Good
Weather-resistance	Good	Good	Good	Good
Oil Proof(Machine Oil)	Acceptable	Acceptable	Acceptable	Acceptable
Gasoline-resistance	Improper	Improper	Improper	Improper
Heat-resistance	90 C 194 F	80 C 176 F	80 C 176 F	80 C 176 F
Cold‐resistance	-20 C -4 F	-40 C -40 F	-20 C -4 F	-20 C -4 F
Water-resistance	Good	Acceptable	Acceptable	Acceptable
Chemical-resistance (Acidity, Alkali)	Acceptable	Acceptable	Acceptable	Acceptable
Starting Resistance	Good	Very Good	Excellent	Very Good

Tire Material	Chloroprene Heat-resistance Rubber	Polyurethane Rubber (thermosetting)		Nylon	Monomer Cast Nylon
Model Number of Wheel	CR	SUI・ SUIE・ SUW・ PNU・ PNUA・ PNUD・ RF・ R		P・ PB・ PBD・ RGN	RR・ UWB・ UWBS・ UWA・ UWBD・ UWBSD
Hardness	HS70	HS95 (SUIE:HS90)		HR120	HR120
Elasticity	Good	Very Good		Improper	Improper
Compression Set	Good	Very Good		Excellent	Excellent
Wear-resistance	Very Good	Excellent		Excellent	Excellent
Weather-resistance	Good	Excellent		Excellent	Excellent
Oil Proof(Machine Oil)	Acceptable	Excellent		Excellent	Excellent
Gasoline-resistance	Acceptable	Very Good		Very Good	Very Good
Heat-resistance	100 C 212 F	70 C 158 F		70 C 158 F	130C 266 F
Cold‐resistance	-20 C -4 F	-30 C -22 F		-40 C -40 F	-40 C -40 F
Water-resistance	Acceptable	Acceptable		Good	Good
Chemical-resistance (Acidity, Alkali)	Good	Improper		Very Good	Very Good
Starting Resistance	Good	Very Good		Excellent	Excellent

Hardness　HS:Shore hardness, HR:Rockwell hardness

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