Thread: Replacing Bridgestone Potenza 255/35 R18 RE050A *Run Flat*
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      07-18-2006, 03:15 PM   #9
vivekk
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Drives: 330i SE
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2005 BMW e90 330iSE  [0.00]
Quote:
Originally Posted by 330m
Is the 90'Y' the speed rating??

I thought the 'Z' as in 225/35 'Z'R18 was the speed rating?

Confused?!?
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