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Is there anybody out there in Crocland that can make a good suggestion as to what size Tires and Wheels would allow the Cayman to be used in temps under 45 degrees. I'm not talking about using the car (speed, turns, etc.) in the same manner one wounld in the Summer. Merely what suggestions that would allow us to us the cars in the Winter weather and allow reasonable traction and safety.
 

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Consumer Reports on winter tires



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<td class="ratmargin" valign="middle" width="160" bgcolor="#005571" height="20"><span class="rathead">Brand and model[/quote]</td>
<td class="ratmargin" valign="middle" width="100" bgcolor="#005571"><span class="rathead">Overall score[/quote]</td>
<td class="ratmargin" valign="middle" width="65" bgcolor="#005571" colspan="3"><span class="rathead">Dry[/quote]</td>
<td class="ratmargin" valign="middle" width="65" bgcolor="#005571" colspan="3"><span class="rathead">Wet[/quote]</td>
<td class="ratmargin" valign="middle" width="45" bgcolor="#005571" colspan="2"><span class="rathead">Winter[/quote]</td>
<td class="ratmargin" valign="middle" width="85" bgcolor="#005571" colspan="4"><span class="rathead">Comfort[/quote]</td>
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indicates a Quick Pick

meriting first consideration.



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<span class="charttext_bold">Michelin[/quote] <span class="charttext">X-Ice[/quote]
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<span class="charttext_bold">Viking[/quote] <span class="charttext">SnowTech (Conti)[/quote]

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<div class="n10" style="BACKGROUND: #cc0000; WIDTH: 81px; COLOR: #ffffff; TEXT-ALIGN: right">81.[/quote]</div>
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<span class="charttext_bold">Goodyear[/quote] <span class="charttext">Ultra Grip Ice[/quote]
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<span class="charttext_bold">Bridgestone[/quote] <span class="charttext">Blizzak WS-50[/quote]
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<span class="charttext_bold">Mastercraft[/quote] <span class="charttext">Glacier Grip II[/quote]

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<div class="n10" style="BACKGROUND: #cc0000; WIDTH: 75px; COLOR: #ffffff; TEXT-ALIGN: right">75.[/quote]</div>
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<p class="charttextindent"><span class="charttext_bold">Gislaved[/quote] <span class="charttext">Nordfrost 3[/quote]
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<p class="charttextindent"><span class="charttext_bold">Nokian[/quote] <span class="charttext">Hakkapeliitta 2[/quote]

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<div class="n10" style="BACKGROUND: #cc0000; WIDTH: 74px; COLOR: #ffffff; TEXT-ALIGN: right">74.[/quote]</div>
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<p class="charttextindent"><span class="charttext_bold">Cooper[/quote] <span class="charttext">Weathermaster S/T 2[/quote]

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<div class="n10" style="BACKGROUND: #cc0000; WIDTH: 68px; COLOR: #ffffff; TEXT-ALIGN: right">68.[/quote]</div>
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<p class="charttextindent"><span class="charttext_bold">Kelly[/quote] <span class="charttext">Wintermark Magna Grip HT[/quote]

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<div class="n10" style="BACKGROUND: #cc0000; WIDTH: 67px; COLOR: #ffffff; TEXT-ALIGN: right">67.[/quote]</div>
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<p class="charttextindent"><span class="charttext_bold">Nokian[/quote] <span class="charttext">Hakkapeliitta RSI[/quote]
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<div class="n10" style="BACKGROUND: #cc0000; WIDTH: 64px; COLOR: #ffffff; TEXT-ALIGN: right">64.[/quote]</div>
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<p class="charttextindent"><span class="charttext_bold">Hankook[/quote] <span class="charttext">W404[/quote]

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<p class="charttextindent"><span class="charttext_bold">Dayton[/quote] <span class="charttext">Winterforce[/quote]
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Tire rack shows that the Continentals are the only tires they carry that fit the Cayman and only in 18'. Has anyone looked at using other sizes like 17s? Will 17s even fit on the Cayman S? 18' snow tires seem like a bit of overkill. I'm thinking maybe some older 17' Porsche wheels would work and allow use of some other tires. Would this be a possibility?
 

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A couple things: if you type in Cayman under Tire Rack they come with a rear tire width the same as the summers. This is NOT what Porsche recommends. They recommend 235/40 on front and 255/40 on rear. As well, you can't go to a 17 inch rim on the Cayman S due to the size of the brakes.
Tire rack shows that the Continentals are the only tires they carry that fit the Cayman and only in 18'. Has anyone looked at using other sizes like 17s? Will 17s even fit on the Cayman S? 18' snow tires seem like a bit of overkill. I'm thinking maybe some older 17' Porsche wheels would work and allow use of some other tires. Would this be a possibility?
 

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Are you sure about the brake issue with 17' wheels and tires? I thought the last generation Boxster S came with the same size brakes (318mm and 299mm) and they came standard with 17 inch wheels. I searched a bit and that's what I came up with. Can anyone verify this?



<blockquote id="quote">quote: <hr id="quote" noshade="noshade" height="1" />
A couple things: if you type in Cayman under Tire Rack they come with a rear tire width the same as the summers. This is NOT what Porsche recommends. They recommend 235/40 on front and 255/40 on rear. As well, you can't go to a 17 inch rim on the Cayman S due to the size of the brakes. <hr id="quote" noshade="noshade" height="1" />




When I said 18' snow tires were overkill I didn't mean they wouldn't work, butjust quite a bit more expensive than 17s with minimal gains in performance.</blockquote>

Edited by - heckler on 07/17/2006 3:38:12 PM
 

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In Memphis, the temperatures don't often get below 28 F. I have the PS2s. Do you really think it is necessary to buy a second set of tires just for the winter?
 

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Sorry, I just saw this. I'm 99% sure that the 17's won't fit because of the brake caliper, but why not just call your Porsche parts/service department for verification?
Are you sure about the brake issue with 17' wheels and tires? I thought the last generation Boxster S came with the same size brakes (318mm and 299mm) and they came standard with 17 inch wheels. I searched a bit and that's what I came up with. Can anyone verify this?



<blockquote id="quote">quote: <hr id="quote" noshade="noshade" height="1" />
A couple things: if you type in Cayman under Tire Rack they come with a rear tire width the same as the summers. This is NOT what Porsche recommends. They recommend 235/40 on front and 255/40 on rear. As well, you can't go to a 17 inch rim on the Cayman S due to the size of the brakes. <hr id="quote" noshade="noshade" height="1" />




When I said 18' snow tires were overkill I didn't mean they wouldn't work, butjust quite a bit more expensive than 17s with minimal gains in performance.</blockquote>

Edited by - heckler on 07/17/2006 3:38:12 PM
 

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My visual 'research' leads me to believe I will be able to use a 17 inch wheel and snow tire combo. This will be both cheaper, and allow a 'taller' and hopefully narrower tire for the northern New England snow area. As soon as I have the chance I'm going to try out the 17's from my '94 964 (essentially same offset) on my Cayman to see if they actually fit.
 

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Discussion Starter · #15 ·
Roadmaster:


I'mm 99% certain you cannot use a 17' tire/wheel combination with the Cayman. I have checked several sources and they say the reason is that the brakes will not allow the 17' wheel to be fitted to the car. Of course, I will be curious to see the results of your attempt. Please let the rest of us know how you make out. Best of luck.


riamga
 

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Last weekend I confirmed that the 7 x 17 front wheel of my '94 964 fits on the front of my Cayman S. It's a close fit over the brake caliper, but it fits. So my conclusion is that a 17' Boxster wheel will work for winter snow tires. I have several photos of the 17' wheel on the Cayman, but I can't figure out how to post them in this response so others can see the mounting.
 

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It wouldn't surprise me becauseI understand that the standard brakes on the Cayman are the same as the last generation Boxster S and they came standard with 17' wheels. I'd like to find someone who has access to the last generation Boxster S wheels and a Cayman S to try this out.
 

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While I was in trying out the other wheel, I took off the part number for the brake caliper. It's actually a 996 number, and so is the caliper that is used across several models. As always, it's good to satisfy your self by trying out the Boxster Wheel, but I'm satisfied now that it works, and so now the problem will be to find a snow tire tall enough to keep the same rolling diameter of the stock tire.
 

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In doing some research on the PCA site it sounds like using the 17s from the 986 would be OK. One issue brought up seems to be that diameter like Roadmaster mentioned could be an issue and the PCA site says it has to be within 5% for PSM and PASM to function correctly.
 
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