Re: Question (m) (archive)

The speed ratings are essentially the saem. In fact you will typically see the tire sidewall listed as a YR17 sizing which just simply indicates the tires maximium sustainable peed up to 186 mph. Technology now exists to be able to rate tiires over a 149 mph (z rated) speed, so that is why you see tire W & Y rated, basically over 149, UP TO 186 mph on the tire, so it is the same tire & tire rating is all.

If you have any other questions, call me, or contact me direct when you are ready for them.

Thanks

Eddie

If ordering, reference "Eddie ext 369" as your Previous Contact when you complete your order, or call me direct!

Eddie
Wheel/Tire Forum Moderator
Retail Sales 800.428.8355, ext 369
Personal Web:
http://www.e46fanatics.com/eddie

: I have a Y2K M Roadster. Currently have original Dunlops on it. When the time comes to replace them I think I'll want to go with Michelin Pilot Sports. There has been talk on the Z3 MB of increasing tire size recently when replacing tires. If I'm not mistaken, some have said that they have done so with the Pilot Sports. When looking at the available sizes in the Tirerack.com site for the pilots, the only sizes that are ZR rated are the OEM sizes (225/45 ZR 17 and 245/40 ZR 17). To go up a size up in this particular tire, are they going to a YR rated tire? I'm new to all this, so maybe there isn't much difference beteween a ZR rated tire and a YR rated tire.

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