11-29-2019, 03:44 PM | #1 |
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If you want good tires, buy the OE M2CS tires
Now that development is done and the Cup2 OE variant has been developed by Michelin, a good option for those looking for a more “track”/“performance” tire can pick up the OE Cup2s off of the M2CS.
The M2CS has nearly equal weight with similar weight distribution and hp/tq. Without pulling up some of my previous posts about the topic, I used to work for a tier 1 tire manufacturer. These OE tires are DIFFERENT from the cup2s you can buy off the shelf at tire rack as generic replacement tires. They’re designed specifically for the car. I know I’m waiting for them to become available |
11-29-2019, 03:59 PM | #2 |
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11-29-2019, 04:21 PM | #3 |
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Not exactly sure where you got info they developed tires for the car.
They are running the same size they've been running all along on the M2, just cup 2's instead.
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11-29-2019, 05:47 PM | #4 |
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StarSpec is a thing. And is a BMW OE compound. Which is why the BMW PSS is quite different than regular PSS
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11-29-2019, 05:58 PM | #5 | |
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11-29-2019, 06:00 PM | #6 |
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11-29-2019, 06:07 PM | #7 | |
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With regard to hitting potholes, there are a million variables but we had standardized tests that correlated pretty well for most rim sizes and materials. |
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11-29-2019, 06:12 PM | #8 |
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One of my ex colleagues now works in Michelin and was able to confirm that there was an explicit program for the M2CS.
I’m pumped, the PSS is a good tire but I don’t drive in rain/snow and don’t really expect to get a long life out of the tire because I hardly put any miles on the car. No way I was going to buy the off the shelf cup2s. |
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11-29-2019, 06:49 PM | #9 | |
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They will out perform even the 4S.
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11-29-2019, 07:14 PM | #11 | |
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https://www.tirerack.com/tires/tires...omCompare1=yes They also come preinstalled on the M Performance Parts 763M wheel and tire sets for the M2 and M2C |
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11-29-2019, 10:23 PM | #12 | |
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I doubt it takes a lot of effort to go from the M3/M4 tire to the M2 version. On Z4M, 1M, Z3M, the tire was directly taken off the M3 without ANY modifications (same part number). |
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11-30-2019, 12:18 AM | #13 |
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I've been running the Star Spec M2 Cup2's and while they're decent when warm, they do not have very good traction until they've gone a lap or two. I highly recommend anyone purchasing the Cup2's to leave it as a track only tire as you're going to get way better cold traction with a PSS or many other tires. When I say cold, I don't mean 50'F...I mean anything under 80'F. The cup2's spin in 3rd gear unless they're up to a decent temp.
Also I will say I've had two track days and about 8000miles on the Bmw Star Spec Cup2's and won't be going back to this tire.
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12-01-2019, 04:28 AM | #15 | |
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12-01-2019, 05:32 AM | #16 |
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12-01-2019, 09:01 AM | #17 |
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CS spec tire will be worth considering if and only if BMW gave the green light to Michelin to develop a track-focused Cup 2.
I'm doubtful. Far more likely it will be closer to the Star Spec that comes with the GTS, which is very mild, street + track oriented. First indication will be tread. If it resembles the Cup 2 R, GM Vette spec, then we might have something. If tread resembles GTS Star Spec, then don't expect any magic. For track purposes you'll be better off with various other R comps.
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12-01-2019, 01:32 PM | #18 |
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Cups only get a 5.5 rating in the rain. Not a good alternative for any location that sees a fair amount of rain. Maybe ok in Southern California but not many other locations.
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12-01-2019, 03:37 PM | #19 | |
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Michelin presumably takes this naming approach to simplify matters, but I don't think it works... "Cup 2" encompasses a range of tires, many of which could be named differently. Performance characteristics between Cup 2 specs vary along the same lines of Pirelli P Zero Corsa vs. P Zero Trofeo R, but yeah, you wouldn't know it unless you're a tire geek.
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