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03-11-2012, 04:47 PM | #1 |
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PSS 285/30/19 - Tired of Waiting
I'm tired of waiting for a 285/30/19 Michelin PSS to be released, so I'm looking for another tire mfg option as I am decided on running a 255/35/19 & 285/30/19 combo based on several threads I've read on here. Do not care about price as this is one area where I don't mind spending money. Have been patiently waiting but I'm close to the wear bars on the rears of my stock PS2s so the time is now.
I'm running stock ZCP 19s and car is not my DD but I do live in a large city downtown so getting anywhere requires DD type conditions. I also live in a wet part of the planet so wet traction is relevant on occasion. 2-3 track days per year and some aggressive mountain road driving is the primary focus. Recommendations from experienced tire whores welcomed. Thx |
03-11-2012, 05:06 PM | #3 | |
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I assume the ad08 has a less square sidewall so no rubbing ? |
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03-11-2012, 05:23 PM | #4 |
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I'm running 285/30 19 rears in AD08.
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03-11-2012, 05:46 PM | #5 |
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The AD08 has a very square shoulder, as much at least as PSS. That said I run 295 on a 10" wide ET22 rear without rubbing (except under full compression, and then only minor.)
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03-11-2012, 08:36 PM | #6 | |
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I don't see that size available in the AD08. Do you mean the Advan ?
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I like that the OD is very close on both the 295/30 & 255/35 but do not want the rears rubbing at any point so the 285/30 is preferable to me. I also wonder about the potential impact to the DSC with any OD ratio (front to back comparative) change from stock. The GTS runs the 255/35 & 285/30 set up, but the question is whether or not making the change from stock ZCP OD to GTS OD will have any negative impact on the DSC functionality on the ZCP due to dissimilar factory settings? |
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03-11-2012, 09:47 PM | #7 |
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Pirelli P Zero Corsa - what the GTS runs.
The actual measured front and rear O.D. are very nearly the same so effectively no stagger. Can't comment on any DSC issues as I'm not running them yet, they are on my new black GTS rims, still have the OEM PS2s on OEM 18" mounted on the car.
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03-12-2012, 10:37 AM | #8 | |
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In taking another look at the stock ZCP ODs for the 245/35/19 & 265/35/19 the tires have a 14mm larger OD in the rear when new. In moving to the GTS set up of 255/35/19 & 285/30/19 they are 6 mm smaller in the rear (compared to the front) so this is an overall change of 20mm (0.8") over the stock OD variance. What concerns me is if the ZCP DSC factory settings are able to adjust to the new variance in tire ODs over stock, and because the rears burn off faster as we put miles on them, the differential between front and rear OD would only increase and could be over 1" after several thousand miles. Having said that, the 255/35/19 & 275/35/19 maintains the same stock 14mm larger rear although both are about 6mm larger than stock which is very slight. The consistency of the OD stagger with this set up may be preferable if in fact the DSC settings are pinned to or are reliant upon the stock OD for proper operation. Hmmmm.... |
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03-12-2012, 01:38 PM | #9 | |
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I am running the Nitto Invo in the 255/35/19 and 285/30/19 and I found it to be a very good if not excellent street tire. I have owned PS2s, Conti SportContact 2 and 3 along with Pirelli PZeros that came with my 997S and I am very happy with the Nittos. When they are new they are greasy as hell and it takes 500-600 miles for them to come into their own. They do like a little more front airpressure to stiffen up the sidewall a little more but these tires grip. As far as them for tracking, well you can do it just make sure they are to temp before you push them hard and I wouldn't go beyond 8/10s. If you want more than this I would say get yourself a dedicated track tire, heck even a PSS is not the best track tire. If the PSSs were available in the 285/30/19 size I would jump on them. The price is not that far off what I paid for the Nitto Invo. BTW, I posted some pics of my setup you may have already seen them. Dave
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03-12-2012, 11:06 PM | #10 | |
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Actual measured Pirelli P Zero Corsa tire diameters... Front: 255/35-ZR19 measures at 25.94" OD Rear: 285/30-ZR19 measures at 25.88" OD Unloaded but inflated and mounted. The true rolling circumference would be fractionally less than Pi times the OD due to the tire flattening against the road surface when loaded. The difference in outer diameters is only 0.23% or nothing. I would call this "no stagger."
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03-13-2012, 12:17 AM | #12 | |
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Dave
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03-14-2012, 11:00 PM | #14 |
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I, too, am in the market for a new tire setup and tired of waiting on Michelin to put the 285/30/19 in production. The Bridgestone Potenza S-04 Pole Position comes in the 255/35/19 & 285/30/19 configuration. Has anybody considered or does anybody have experience with the Bridgestone Potenza S-04 Pole Position?
These tires were ranked 2nd in the Tire Rack test right under the Michelin Pilot Super Sport. In the Tire Rack test, the reviewers stated they had a hard time selecting which tire they preferred between the Michelin PSS and the Bridgeston S-04 Pole Position. |
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03-15-2012, 11:14 AM | #15 |
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a bit OT but just to confirm
e90 zcp on stock wheels and suspension: 255/35 F and 285/30 rear will not rub, retain close to factory stagger, and sit "flush" I have 12.5mm spacers all around with my stock 245/35, 265/35, I'm bouncing back and forth between 255/35, 275/35 or 255/35, 285/30 sizes for my next set, but I'm guessing the spacers I have will work fine for the first set up and not the second....
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03-15-2012, 12:05 PM | #16 | ||
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I did come across pics of your car in my search yes, very nice indeed. Quote:
I was using the example based on the calculator ratios to pose the question regarding what the DSC is originally programmed for, and the amount of variance from "stock" settings is tolerated in OD before the DSC goes squirrelly - Variance on the front/rear stock PS2 is 14 mm with the rear being larger - the Corsa measurements you provide above make the rear 1.5 mm smaller than the front for an overall variance of 15.5mm (0.6") over the stock PS2 and will only increase as the rears wear at a faster rate than the fronts. |
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03-15-2012, 12:34 PM | #17 |
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03-15-2012, 01:55 PM | #18 |
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Meff, I got DSC intrusion even when the tires were stock. The only time I see an intrusion with the DSC is when I have throttle input with a lot of steering input at the same time. If I am going straight it will allow some wheel spin.
Now when the tires hit the 80% worn period you spin the rears alot... Dave
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03-15-2012, 02:02 PM | #19 | |
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The 255/35/19s come in at 29lbs while the 285 are at 30 lbs. PS2s come in at 25lbs and 26lbs, the OEM weights for a 19" PS2 245/35/19 and 265/35/19 are 24lbs and 25lbs. With the SO4s you are adding 20lbs of rotational mass. Yes you are adding width to the tire but a lot of weight as well. I would try to get the width without adding much to rotational mass. The Invos come in at 25.5lbs and 27lbs for the 255/285 setup. Dave
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03-15-2012, 02:40 PM | #20 |
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^^^^^^^^^
The above is just all about compromise. You can have a relatively heavy tire with stiff sidewalls (better for cornering, especially on our fat cars) and solid construction, or a lighter tire that will roll over easier and not feel as stable on the car. Depends on what you are looking for. A tire like a continental DW will ride great, wear well and handle pretty well, especially compared to something like a v12 tire. However, if you are looking for performance tires, something like an ad08 or re-11 would be better. A balance between the two would be the PSS tires from Michelin. Ive had all of these brands of tires, and the PSS strikes a good balance between the two spectrums. That said, a tire like an re-11 enhances the handling capabilities of the m3 even further. I really enjoyed that tire, just wish they made them in a size that was more M3 friendly. On the m3 you can fit a 265/30 and 295/30 setup on a 9/10 " wheel like the zcp, thats what I would do if I were you with a PSS tire. You get a little more sidewall than the 285/30 and are closer to the OEM rolling diameter.
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03-15-2012, 05:18 PM | #22 | |
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You are right it is all about compromises, however, if the car is a DD you want something that handles good yet can offer reasonable comfort, this is where the Bridgestone falls down. You can't go wrong with the OEM GTS sizing. Dave
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