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YOUR RESEARCHtire dillema
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Replace michs
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Just replaced the Michs with 18" Continental EXTREMECONTACT SPORT on my 04 996 and VERY happy with the results.
Leading evidence: 'Replace michs' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'about 12 k' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check ad section' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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The street set are whatever happens to be on sale, and replaced only when worn.
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I tried this a couple of years ago - replaced P-Zero rears with Michelin's and left the fronts on as they still had plenty of meat on them.
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Three weeks later I was back at Discount Tire getting the fronts replaced with Michelin's.
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03 cab 67k miles. Bridgestone So 2's all around. I suspect about 12 K on tires. Had a rear tire failure and tire not repairable. Not a track car but daily driver with occasional 5 -6 hour trips at 70 to 85 mph. Have noticed tires seem to be getting noisier.
Not sure if I should just replace the one tire with another SO 2 or replace both as they may have hit 1/2 time of usefulness.
I really like Michelins and the PS 2 are only about $60 more per tire.
Was thinking about 2 PS 2's for rear and leave BR Potenzas SO2 on front. I know some people seem to claim that all 4 tires should be same but I have never seen any proof of that statement.
Hi performance or track is not my goal but quiet smooth ride and longevity are what I am looking for.
Looking for thoughts from people with experience with both tires and thoughts on diff mfch. on front and rear.
thanks
RBC
Sounds like you should check the build dates on the tires. some great info if you do a search on tire build date.
You could have just a 100 miles on a set of tires with old build date and be junk.
It's not just "some people" making this claim. It's the manufacturer.
Porsche recommends running the same tire on all four wheels. In fact, they recommend that you only use N-spec tires from the same series, so you can't mix N0 and N1 versions of the same tire, as an example.
Check the Porsche recommendations at your dealership and you'll find this in writing. I believe it's available on the Porsche website also.
No problem!
Tires always tend to spark a debate on the forums, especially when you discuss the need for N-spec tires. I prefer to use N-spec tires as the manufacturer recommends, but many people prefer different options.
As I understand it, the main question really is "Can you use rear tires different from the front tires?", right? If you drive on the track, or push your car hard on canyon roads and corners, then my answer is "No". It is for this use that Porsche recommends all 4 corners have the same type of rubber, as different tires will behave differently and your car may not perform as Porsche engineered it to perform. However, for regular street and highway driving, even at 80 MPH on the open highway, the differences between brands will not be an issue. At 80 MPH on the open highway, state troopers are the issue, not tires. I have two sets of tires and wheels, one set for track and another for street. The track set are always same rubber, and same age regardless of wear. The street set are whatever happens to be on sale, and replaced only when worn. So the street set often ends up not only with different brand tires between front and rear, but different wear/age as well since the rears will wear out quicker. Never had issues in 15 years of ownership. And my car is a C4S, where the AWD would be more sensitive to front and rear difference.
I dont know why anybody would put the most expensive, hi performance tires on a daily car. Put a sensible priced, higher mileage tire and dont worry about the hi perf advantages you will never achieve anyway
Porsche says for both tires on an axle to be replaced if the tread depth difference between the new tire and the old tire is 30% or more. With 12K miles on the tires I suspect the tire tread depth difference will be over 30%.
If you require hard numbers the place where you take the car to get the tire should be able to measure the old tire and advise you if it needs to be replaced.
Porsche tire guidelines are against mixing tires as you seek to do.
If you chose to ignore Porsche in this regard then you can do as you wish.
After a lot of research, etc. I decided to order Mich PS 2's for the rear and leave still good Bridge Pot. S0 2 on front. When they wear out I will go for Mich upfront.
Found a Ford dealer with Road Force and will have them mount and balance for about $40 a piece.
I ordered tires from TR, I did find another discount tire place that was about $150 cheaper, but after reading all the crappy reviews went with TR.
I will check in a couple of months from now and let y'all know how it went.
RBC
I had the same option a few months ago, buy newer technology in PSS or buy N rated PS2s. The Michelin rep advised to go with PS2s.
I don't venture anywhere near the limits of the cars capability but my car does feel better and a certainly like them more than the P-Zeros I had before.
I was VERY happy after I got the tires mounted with RoadForce. Would suggest to spent a little extra money and get all four tires done. If done properly (I would advise if they let you to stay with the car/tires when they do) the car will drive so much better. Let us know your experience.
Volkert
I tried this a couple of years ago - replaced P-Zero rears with Michelin's and left the fronts on as they still had plenty of meat on them. Three weeks later I was back at Discount Tire getting the fronts replaced with Michelin's. YMMV, but there was just a difference in tracking that didn't inspire confidence.
R
Just replaced the Michs with 18" Continental EXTREMECONTACT SPORT on my 04 996 and VERY happy with the results. I ordered them via my independent Porsche shop same price as TR.
Went to dealer today to get the PS 2's road force mounted. Found a 1/2 inch crack in rim of bad tire. Was advised to get it fixed or replace it. It will be looked at Mon. by someone who repairs alloy rims. Hopefully he says he can do it, or else I will be looking for another rim.
Anybody have a line on a used 18" stock rim? These are the regular 5 spoke. I will check ad section.
RBC
if money is no issue then sure go ahead and replace with 4 michelins - that is the best
next step down would be to replace the rears with michelins and leave your fronts. If you have tracking issue you could always replace fronts later. So doubt for regular highway use and speeds in this country there is any issue
cheapest option would be to get another 1/2 used Bridgestone on fleabay - I did that with my pirelli and had good results. Got another 5k out of the rears that way
last option would be to replace all tires with new sumitomos - might be cheaper than 2 the michelins and perfect for daily driver use ...
n1 spec is appropriate for autobahn or track - but not required for us highway speeds. I've never had issues with my sumis , including use at track day. Best bang for the buck for the 996 in my opinion ....
