UKAI Mark

Basic Data of Tire Material
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S / PN / PNA / PND / RG / H / PC / SH / SR
CR / SUI / SUIE / SUW / PNU / PNUA / PNUD / RF / R
P / PB / PBD / RGN / RR / UWB / UWBS / UWA / UWBD / UWBSD

Tire Material Natural Rubber Polybutadiene
Rubber
Polybutadiene
High-Rebound Rubber
Polybutadiene
Red Rubber
Model Number of
Wheel
- SPNPNAPND
RGHPC
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 SUISUIESUWPNU
PNUAPNUD
RFR
PPBPBDRGN RRUWBUWBSUWA
UWBDUWBSD
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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