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JeanJohn

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  • Porsche Club
    PCA (Porsche Club of America)
  • Present cars
    2008 Lexus LS 460L
    2003 Porsche 911 C4S
    1982 Porsche 911 SC
    1989 Ford F150
    1993 Lexus LS 400

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  1. JeanJohn
    Thanks. Great information. Seems like the A/S Plus' would be within specs, provide optimum performance for the type of weather we get here in the mid Atlantic region, and offer dramatically better longevity while still enabling "reasonably" spirited driving. Not to mention they are less expensive than the PS2. One thing I did notice when I went to the A/S on my 911/SC a few years back is they seemed narrower than the same profile performance tire. So, I'm going to have the dealer order both the A/S and PS2 and will compare to ensure there is not an objectionalbe difference in perceived width at the C4 required size. Additional gotch - Michelin tech support confirms as their web site shows that that OEM rear tire for the 2003 C4S is 285/30 even though some other experst say 295/30 and my vehicle has 295/30s mounted. But, the PS AS Plus 285/30 mounts on 9 1/2" to 10 1/2" wheels while a 295/30 mounts 10" to 11" wheels. So my existing 295/30s could be mounted on 10 1/2" or 11" wheels and now I have to determine which one it is. Can that be done without dismounting tire and measuring?
  2. JeanJohn
    Thanks. Great information. Seems like the A/S Plus' would be within specs, provide optimum performance for the type of weather we get here in the mid Atlantic region, and offer dramatically better longevity while still enabling "reasonably" spirited driving. Not to mention they are less expensive than the PS2. One thing I did notice when I went to the A/S on my 911/SC a few years back is they seemed narrower than the same profile performance tire. So, I'm going to have the dealer order both the A/S and PS2 and will compare to ensure there is not an objectionalbe difference in perceived width at the C4 required size.
  3. JeanJohn
    Great information that I would never have thought to look for (or how), especially since Michelin appears to be showing the incorrect sizes for the 03 C4S. Thanks.
  4. JeanJohn
    Are the 03 C4S and 04 C4S spec'd with the same tire sizes. Seems like they should be but at the same time Porsche does uplift selected components year over year.
  5. JeanJohn
    I undertstand and your response agrees with the Tire Rack claim. However, as noted, the owners manual shows 285/30 as does the Porsche North America Web site and the Micheline web site when you select C4S as the type. I'm trying to understand where the two recommendations diverge and whether Tire Rack's assertion that 295/30s are required to keep the tires the same diameter for all wheel drive is a true statement and if not adhered to will eventually affect some form of malfunction.
  6. JeanJohn
    I am nearing end of life on my 2003 C4S' Contis, 225/40 front, 295/30 rear. The Porsche North America web site, Michelin web site, my owners manual and several tire sites show 285/30 as the appropriate match for the 225/40 fronts. Tire Rack says that the rears should be 295/30 because "an all wheel drive car needs tires that are the same height front and rear and that only the 295/30's meet this requirement". Is Tire Rack right? The local Porsche dealer does not have an answer. I called Michelin but they were closed for the week for the Holidays. Porsche NA does not have a phone number that I can find. The question has significance because I am considering Michelin Pilot Sport A/S Plus' for the C4S and the largest size available is 285/30. The reason I like the A/S is that a set of high performance (Michelin, Dunlop, Conti, Pirelli, I tried them all) tires for my 1982 SC lasted about a year until I installed the Michelin A/S and I have had these on for three plus years now with no noticeable wear. I don't track either of these cars, and rarely top 85 MPH in normal beltway and interstate driving in Northern Virginia. The A/S’ seem to have more than adequate handling for the way I drive, are cheaper than the PS2’s I would buy otherwise, offer improved wet weather and cold traction, and hopefully will last more than a year on the C4. Any suggestions/opinions will be carefully weighed.
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