cayman s wheels--18 vs 19 inch
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Thread: cayman s wheels--18 vs 19 inch

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    cayman s wheels--18 vs 19 inch

    No PASM and don't plan on going to the track. What would difference in ride be between the standard (18) and 19 inch wheels? Any input? Thanks.

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    19" wheels will be firmer. Try to drive a Cayman with each size wheel if you can. Some find the 19" wheels to be a little harsh. I have them and they are fine but I have PASM.

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    I have 19" wheels for daily use and 18s for the track, I also have PASM. The 19s are a much firmer ride (you will feel the bumps in the road). I personally like the way they look on the car and there is a much larger selection of Porsche dealer offered wheels to select from in 19s, this may be due to the large number of high quality after market 18s available that are comparably priced. The major down side of the 19s is tire selection and price. The 19s do not have as wide of choice of tires and they are significantly more expensive. Either wheel/tire set you end up with is considered a low profile type. Performance wise for street use I would say they are fairly comparable.

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    Quote Originally Posted by rlm328 View Post
    Performance wise for street use I would say they are fairly comparable.
    This statement has always puzzled me. Theoretically a wider lower profile tire should increase performance, more responsive and more traction. That said I can see that the heaver wheel/tire combo and its resultant increase in unsprung weight could adversely affect some performance aspects in a racing scenario, but if performance is not better with a wider wheel and tire then why would a company offer a wider wheel? Only for looks?

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    I think the comment about street performance being equal means that for street driving at responsible and legal speeds, the additional grip of bigger wheels is not noticeable because you don't run out of grip with the smaller wheels at street legal speeds. Higher speeds and more aggressive driving is different.

    As for the original question...there is a very noticeable ride difference between the 18" and 19" wheels in a non-PASM equipped car. It will just depend on what you are looking for. I second the notion of drive what you are considering. Your thoughts on the combo are the only ones that matter.

    That said and for what it is worth (which is nothing ) I would not want a daily driven car with 19" wheels with the standard suspension; however, I do have a daily driven car with PASM and 19" (the ride of the 19" with PASM vs. without PASM is huge IMO...I drove both).
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    Quote Originally Posted by RobMason View Post
    Theoretically a wider lower profile tire should increase performance, more responsive and more traction. That said I can see that the heaver wheel/tire combo and its resultant increase in unsprung weight could adversely affect some performance aspects in a racing scenario, but if performance is not better with a wider wheel and tire then why would a company offer a wider wheel? Only for looks?
    The tire width is the same whether you get the OEM 18" or 19" wheels. C'mon, you reallly don't think Porsche would offer an option only for looks, do you?
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    Quote Originally Posted by RobMason View Post
    This statement has always puzzled me. Theoretically a wider lower profile tire should increase performance, more responsive and more traction. That said I can see that the heaver wheel/tire combo and its resultant increase in unsprung weight could adversely affect some performance aspects in a racing scenario, but if performance is not better with a wider wheel and tire then why would a company offer a wider wheel? Only for looks?
    In the Caymans case (if my memory servers me correctly) both the 18"s and the 19"s share the same tire width, only the aspect ratio is different.

    The Cayman is such a well balanced car to begin with, it's really hard for even an above average driver to un-stick the 18"s on the street without doing something really stupid, so "moving up" to 19"s is pretty much a mute point performance wise. On a nice smooth track they may have a slightly better turn-in and a very small bit of extra grip, but we're talking very minute here.

    The differences between the ride of a non-PASM car shod with 18"s vs. 19"s is fairly significant IMO. Of the examples I drove, the 19" equipped cars tended to slam and bounce over bad sections of pavement actually making them less grippy compared to the more forgiving 18"s. If I only had smooth black-top roads around me, I'd think about the 19"s......but that usually isn't the case for most people. For the street it's definitely a "looks" deal IMO,.....and it's a great profit maker for Porsche, hence the many 19"s offered by them at $$$ prices.

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    I drove both 18 and 19 inch equipped Caymans - non PASM. I did not know that the second car had 19 inch wheels until I brought up the difference in ride. The difference was very noticeable although both wheels are stiff. I was really temped to get 19 inch because "bigger is better" and I do think they look a little better. In the end I went 18 inch because I found a car had everything else I wanted and I did not have to order it - I think I made the right choice. Drive both on a rough road and decide for yourself.

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    Quote Originally Posted by RobMason View Post
    This statement has always puzzled me. Theoretically a wider lower profile tire should increase performance, more responsive and more traction. That said I can see that the heaver wheel/tire combo and its resultant increase in unsprung weight could adversely affect some performance aspects in a racing scenario, but if performance is not better with a wider wheel and tire then why would a company offer a wider wheel? Only for looks?
    If you do a bit of searching, as I did a few months ago, you'll find that although the 19" wheel is heavier, the tire is lighter and the overall weight difference is essentially negligible (within a pound if I remember correctly). There is a limit to where the lower profile tires gives better handling, but I would bet that sidewall deflection is a major factor. Look at an F1 car - huge sidewall but little actual suspension travel. The combination of the two is critical - I remember all the trouble that Indy cars had when they switched to radials - they had a hell of time adjusting to the more flexible sidewalls and really had to increase spring rates.
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    Quote Originally Posted by Chris S View Post
    The tire width is the same whether you get the OEM 18" or 19" wheels. C'mon, you reallly don't think Porsche would offer an option only for looks, do you?
    In all of the discussion threads about 18 vs. 19 , have never seen a mention of the fact that the recommended tire pressue for front tires is 29 psi for 18 inch, and 32 psi for 19 inch. Rear tires are the same at 36 psi for both 18 and 19 inch. Could a 3 psi difference in front tire pressure be contributing to a difference in handling response and ride softness?

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    anyone have any reasonably priced stock 18" cs wheels/tires 4 sale? i'm looking for a second set for track/x-cross.
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    Re: cayman s wheels--18 vs 19 inch

    Bringin' back an oldie thread!

    I'm thinking about buying a 987.1S with stock 19" wheels (and PASM). I actually like the look of the stock 18" wheels. This is probably a stupid question, but can I simply swap the stock 19" rims with stock 18" rims? Not sure if the holes are the same and if having PASM makes a difference.

    Thanks!

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    Re: cayman s wheels--18 vs 19 inch

    Quote Originally Posted by black987 View Post
    Bringin' back an oldie thread!

    I'm thinking about buying a 987.1S with stock 19" wheels (and PASM). I actually like the look of the stock 18" wheels. This is probably a stupid question, but can I simply swap the stock 19" rims with stock 18" rims? Not sure if the holes are the same and if having PASM makes a difference.

    Thanks!
    Yes...you can swap 19" and 10" OEM wheels with no issues. We have a set of 19" OEM Boxster Spyder wheels on our PASM-equipped Cayman in the summer, and swap over to a set of OEM 18" winter wheels.
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    Re: cayman s wheels--18 vs 19 inch

    The 18" 987.1 BS wheels will fit just fine. The mounting hole dimensions are identical and PASM will have no effect on fitment.
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    Re: cayman s wheels--18 vs 19 inch

    Quote Originally Posted by black987 View Post
    Bringin' back an oldie thread!

    I'm thinking about buying a 987.1S with stock 19" wheels (and PASM). I actually like the look of the stock 18" wheels. This is probably a stupid question, but can I simply swap the stock 19" rims with stock 18" rims? Not sure if the holes are the same and if having PASM makes a difference.

    Thanks!
    Wow, almost a 10 yr old thread. At least you're searching...

    I swap 19" summer tires to 18" winter tiresicon with no issues. The TPMS senses the change and asks me if I'm going from one set to the other. As long as you're going to factory Porsche wheels, there will be no issues with bolt pattern. If you're buying aftermarket wheels, the Porsche bolt pattern is 5X130.

    What you need to be sure to buy are wheels for a 987 that have the proper offset. The proper offset for a 987 with 18" wheels are 57 front, 43 rear. Do a search on offset to get an education on this topic. Do not buy a set of wheels unless you're sure they have the proper offset. Trusting an ebay ad is not good enough. Get the actual #s to be sure. Width also factors into the equation. Be sure before you buy anything. It could turn into an expensive mistake.

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    Re: cayman s wheels--18 vs 19 inch

    Quote Originally Posted by husker boxster View Post
    Wow, almost a 10 yr old thread. At least you're searching...

    I swap 19" summer tires to 18" winter tiresicon with no issues. The TPMS senses the change and asks me if I'm going from one set to the other. As long as you're going to factory Porsche wheels, there will be no issues with bolt pattern. If you're buying aftermarket wheels, the Porsche bolt pattern is 5X130.

    What you need to be sure to buy are wheels for a 987 that have the proper offset. The proper offset for a 987 with 18" wheels are 57 front, 43 rear. Do a search on offset to get an education on this topic. Do not buy a set of wheels unless you're sure they have the proper offset. Trusting an ebay ad is not good enough. Get the actual #s to be sure. Width also factors into the equation. Be sure before you buy anything. It could turn into an expensive mistake.
    Excellent information and advice! Thanks!

    It's my understanding PASM has the ability to lower the car 10mm. If I put 18" tires on the car, wouldn't they have a smaller diameter than the 19" and therefore make the car even lower yet?

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    Re: cayman s wheels--18 vs 19 inch

    Quote Originally Posted by black987 View Post
    Excellent information and advice! Thanks!

    It's my understanding PASM has the ability to lower the car 10mm. If I put 18" tires on the car, wouldn't they have a smaller diameter than the 19" and therefore make the car even lower yet?
    The sidewall of the 18" tire is taller then the 19" so they will off-set and the overall height will remain the same.
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    Re: cayman s wheels--18 vs 19 inch

    The 18" Cayman S wheels are 8" / 57et front, 9" / 43et rear.

    Cars equipped w/ PASM are 10mm lower than std cars. They are always 10mm lower, not just when you go into sport mode.

    I just measured my LE with 19s and my CSS with 18 snows - the rear tire is 1" shorter on the CSS, so putting 18s on a PASM car that came with 19s will lower it 1/2".

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    Re: cayman s wheels--18 vs 19 inch

    I have 981S with 19" wheels and no PASM. It has THE nicest street ride I every had in any car. Firm but not punishing at all. Porsche stock suspension is magic, and PASM is absolutely unnecessary for a nice ride.
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    Re: cayman s wheels--18 vs 19 inch

    Quote Originally Posted by husker boxster View Post
    The 18" Cayman S wheels are 8" / 57et front, 9" / 43et rear.

    Cars equipped w/ PASM are 10mm lower than std cars. They are always 10mm lower, not just when you go into sport mode.

    I just measured my LE with 19s and my CSS with 18 snows - the rear tire is 1" shorter on the CSS, so putting 18s on a PASM car that came with 19s will lower it 1/2".
    Is that okay that it is lowered another 1/2", or is it no big deal? I know I've got to be careful going up or down driveways and ramps, but will the extra .5" make scraping the pavement all but assured?

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