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Cayman Tires & WheelsDiscussion of Tires, Wheels, Suspension, etc.
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Can someone please tell me what the specs are on the 19" wheels and tires i.e. width, bolt pattern, and tire series for both front and back. I did a search and could not find this info. Thanks!!!
From the owners manual....doesn't list the bolt pattern though.......
<p align="left">Summer tires
<p align="left">front 235/40 ZR 18 91Y 8 J x 18 H2 57 mm 58.5 in./1486 mm
<p align="left">rear 265/40 ZR 18 101Y XL 9 J x 18 H2 43 mm 60.2 in./1528 mm
<p align="left">or front 235/35 ZR 19 87Y 8 J x 19 H2 57 mm 58.5 in./1486 mm
<p align="left">rear 265/35 ZR 19 94Y 9.5 J x 19 H2 46 mm 60.0 in./1522 mm
Are the 19" carrera S wheels from the 997C4S any different from the optional 19" carrera S wheels for the cayman? The C4S fits 315s on the rears when we get 265s. I had no idea such different tire widths can fit on the same rim.
No they're not... for 997s and 4s, they're 11' wide... for the Cayman, they're 9.5' or 10' wide. There's no way that 265mm and 315mm tires can share the same width wheel. The depth of the fender has a lot to do with what fits underneath, too.
brad
__________________
21-year PCA Member
PCA DE Instructor
The cars are so new, I'm not sure anyone really knows how much room is under the fenders yet. You might look at www.wheelenhancement.com and call them and ask. They're in the LA area, but ship anywhere. These guys really know their stuff about Porsches and the wheels and tires that go on them, but I'm not sure if thay'll know much about what fits on the Cayman yet.
brad
__________________
21-year PCA Member
PCA DE Instructor
There's no way that 265mm and 315mm tires can share the same width wheel.
Brad, surprisingly a 10.5' wheel will work for both size tires, at least with Michelin PS2. 10.5 is at the top of the width range for the 265 & at the bottom for the 315. Approved widths for other tire may differ.
Has anybody as yet measured the exact weight of wheel ( rim+tire ). I recall a video on porsche.com implied that the 18' was designed to be lightest - there was some talk here that one of the 19' was in fact the lightest - any input ?
That surprises me, I guess. I be afraid that in hard driving, the narrow wheel would tend to let the 315s flex the sirewall (what little there is) too much. I have 11' wheels on the back of the turbo, and the 295's look about right on it.
You're right, Porsche like their cars to understeer, so you'd need a lot more rubber on the front if you went that wide in the back.
brad
__________________
21-year PCA Member
PCA DE Instructor
I am still trying to decide on 18' or 19' wheels. The Carrera S wheels are 1/2' wider than the 18' but have the same tread width. Does the extra 1/2' put more rubber on the road? I drove a Cayman yesterday with 19' wheels and the standard suspension. I wonder if the 18' would be more comfortable and would I notice performance difference? I compared the ride to a 911 Carrera S with 19s and PASM and it seemed to me that the PASM took the edge off the bumps. I am concerned that PASM violates the KISS principle not to mention the extra $$.
What do you think?
Ruby
PASM - Porsche Active Suspension Management
This active damping system offers continuous adjustment of individual damping forces based on current road conditions and driving style.
The driver can choose from two setup modes, ‘Normal’ and ‘Sport’, using a separate ‘damper’ button on the center console. ‘Normal’ mode is designed for general road driving and circuits with uneven tarmac. ‘Sport’ mode is intended for smoother track surfaces, where the harder settings help eliminate pitch and roll.
In either mode, PASM continuously evaluates the current conditions while automatically selecting the corresponding damper rates from the respective set of mapped values.
A range of sensors are used to monitor the movement of the body under acceleration, braking and cornering maneuvers, as well as on poor road surfaces. The PASM control unit then evaluates this data and modifies the damping force on each individual wheel in accordance with the selected mode. The result is a significant reduction in body movement as well as a better grip on the road.
For example: if ‘Sport’ mode is selected, the suspension is automatically set to a harder damper rating. If the quality of the track surface falls below a certain threshold, the system immediately changes to a softer rating within the ‘Sport’ setup range. When the quality of the tarmac improves once more, PASM automatically returns to the original, harder rating.
Need more information about PASM? Click this link: FAQ for PASM
