I have them too...my car stays on the road and they seem to grip well. As you can tell, I'm not a expert.
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'05 987 Basalt Black/Sand Beige
5 spd, 18" wheels
AH-64 Apache
RC-12 Guardrail
RC-7 Crazy Hawk
"If the wings are traveling faster than
the fuselage, it's probably a helicopter--
and therefore, unsafe" --Unknown
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