| Porsche Tires & Wheels Discussion of Tires, Wheels, Suspension, etc. |
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04-16-2009, 07:53 PM
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Porsche Prophet
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Location: Los Angeles, CA
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Miss matched front and rear tires
I need to replace my rear tires one has a side wall blister and tread is 50% gone so need to replace both. the front tires are in great shape, 90% left. Don't want to get the same P Zeros to expensive and didn't like them much. Can I put different brands on the rear? I know left and right tires must mach but is the front and rear tire matching a myth?...
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04-16-2009, 08:11 PM
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Boxster Enthusiast
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Re: Miss matched front and rear tires
I'm doing it right now. I had some Bridgestone Pole Positions and I usually use 2 sets of rears for each front set. I decided to go back to PS2s, so I replaced the rears and left the PPs on the front. I didn't notice a difference. I wouldn't track my car without a matched set. I think you'll be OK as long as they are similar type tires.
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04-16-2009, 09:13 PM
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Porsche Purist
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Re: Miss matched front and rear tires
And I'm hesitant to replace just the worn PS2 rears with more of the same?
Be careful out there.
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04-17-2009, 06:22 PM
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Porsche Spieler
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Re: Miss matched front and rear tires
Well its not that I recommend it, but I have Ecsta's on the fronts and OEM Potenzas on the back, I think the Ecsta's have a little less grip but overall its ok.
P.S. I did participate in track events (albeit low speed ones on a karting track)
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04-17-2009, 06:35 PM
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Porsche Prophet
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Re: Miss matched front and rear tires
Personally, I'd keep the same brand all the way around. Kinda' sloppy to have mix-match tires....but that's just me. Michelin PS2's are my choice....since it came with them new......
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04-18-2009, 10:05 AM
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Porsche Enthusiast
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Re: Miss matched front and rear tires
Maybe you could swap all four with a matching set, and sell the fronts either locally (no shipping necessary). There are several shops in the bay area that buy and sell used tires.
Alternately you could sell 'em on craigslist or ebay. This way you reach a wider "audience" and recoup some $ for the fronts.
BTW you also get rid of the the tires that you admittedly don't like much.
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Jason
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04-18-2009, 11:19 AM
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Porsche Activist
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Join Date: Feb 2008
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Yes you can swap one end at a time.
I was running Nitto fronts and PS2 rears for a while. My observations are, as the tire becomes worn and heat cycled, the only real problem you'll run into is a raised PSM threshold. I believe the PSM must work off of the tire's slip angle, and of course worn out burnt tires don't generate much slip angle before they break loose. I noticed the same with thing with my Corvette too.
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PSM - Porsche Stability Management
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While it can’t overcome the laws of physics, the revolutionary Porsche Stability Management (PSM) system does lend an added degree of balance and control to the Cayman’s mid-engine driving dynamics, inspiring surefooted confidence in corners and extreme situations.
A standard feature on the Cayman and Cayman S, PSM continuously monitors steering input, road speed, yaw velocity and lateral acceleration to calculate the actual direction of travel. If the car begins to steer off line, PSM instantly intervenes with precision brake inputs on individual wheels to help bring the car back onto the driver’s intended path.
If braking alone isn’t enough to correct the vehicle’s cornering line, PSM then calls on the Cayman’s engine management system, adjusting engine output as needed to help stabilize handling. PSM can also compensate in an instant for mid-corner changes in load resulting from deceleration or braking. When Sport mode is selected with the optional Sport Chrono Package, PSM’s threshold for intervention is raised, allowing for greater driver involvement. If you prefer driving without automatic PSM assistance, the system can be set to standby at any time. In this case, it will only intervene under heavy braking, where both front wheels exceed the ABS threshold.
For all of its technical ability, PSM goes virtually unnoticed in everyday driving situations, preserving the Cayman’s natural agility. |
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