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Old 10-20-2004, 10:44 AM   #2
Scooby Specialist
Member#: 48928
Join Date: Nov 2003
Location: Pittsburgh, PA
'02 WRB WRX Sedan
'11 DGM WRX 5dr Premium


I don't think the speed rating difference would be enough to significantly change the performance of the tire. Speed rating mostly relates to internal construction so the Z rated tire may be slighly more reinforced than the V rated, but I wouldn't count on a noticable difference. It is also entirely possible that the V rated tire could achieve Z ratings as well but simply aren't badged as such to fill in a market segment (in other words, tires may be manufactured to the highest spec and simply sold at different speed ratings to satisfy the market.)

Other areas like tread compound and pattern will most likely be unchanged.
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