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Speed 6% high
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04-09-2013, 03:16 PM
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j.fro
Rennzenn
Join Date: Feb 2005
Location: Virginia
Posts: 1,369
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986RS
Long term project...
Fiat 500 Abarth Cabriolet
Mine was also off by about the same amount until I switched to 275/35/18 tires. Now according to my dashboard GPS app, it is dead on.
j.fro
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