01-05-2017, 01:51 PM | #1 |
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Sport Cup 2 for ZCP M3/M4???
Does anyone know if it's possible to get Sport Cup 2's for the standard 666M's wheels on the ZCP cars?
I know the M4 GTS has a 19/20 setup so there's a difference there, but I'm curious what you guys have been doing for tire upgrades on a ZCP.
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01-05-2017, 02:53 PM | #2 |
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You'd have to run a 245/35/20 and 285/30/20 cup 2 setup. That's the only size that would work well for cup 2. The height of both 245/35/20 and 285/30/20 are the same, so not much DCS / TCS intervention.
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01-05-2017, 09:26 PM | #3 | |
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Wouldn't a 245 section front SC2 be too narrow/counterproductive compared with the 265 PSS though?
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01-06-2017, 12:16 AM | #4 | |
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The 265/30/20 (* BMW) pilot super sport have a tread width of 8.9" So the 245 cups are actually wider. The 265 bmw spec oem PSS run thin for 265s. Even if the 245 was actually thinner than the 265, the compound would still make the cup 2s stickier.. apples to oranges |
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01-06-2017, 01:31 AM | #5 | |
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01-06-2017, 02:32 AM | #6 | ||
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01-06-2017, 07:08 PM | #9 | |
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01-08-2017, 02:20 PM | #10 | |
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01-08-2017, 04:48 PM | #11 | ||
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Pilot cup 2 http://www.tirerack.com/tires/tires....ot+Sport+Cup+2 PSS ZCP Shows only the tread width, not the section width, but the tread width is the contact patch size, so it gives you a good idea as compared to normal PSS or Cup 2s. http://www.tirerack.com/tires/tires....ot+Super+Sport I had a little chart I made comparing similar sizes in 20s, for my own reference for 20x9 20x10 setup Tire Section Width Tread Width Hankook EVO2 255/30/20 10.2" 9" Hankook Evo2 275/30/20 10.9" 9.8" Michelin PSS 255/30/20 10.2" 8.8" Michelin CUP2 245/35/20 9.8" 9.6" Michelin CUP2 265/35/20 10.9" 10.1" Michelin PSS 265/30/20 8.9" (ZCP BMW *) (Only tread width listed) Michelin PSS 265/30/20 10.7" 10" Michelin PSS 275/30/20 10.9" 10.1" Michelin PSS 285/30/20 11.4" 10.2" Michelin PSS K1 285/30/20 11.4" 9.5" (Ferrari) The number on the far right is tread width, and the numerical value directly to its left is section width (if available) They don't have specs yet for 285/30/20 ZCP that I can find, but by looking at the 285/30/20 ZCP vs a standard PSS ZCP you'll notice the sidewalls are stretched vs squared off. So it'll definitely run thin as well. Last edited by JamesGames; 01-08-2017 at 05:03 PM.. |
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01-10-2017, 09:42 PM | #12 | |||
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My curiosity is understanding why the * spec ZCP PSS is narrower and more importantly how that(changing that) will affect driving dynamics/steering response. For example, the SC2 having a wider contact patch in spite of the 245 section...setting aside the massively stickier compound, how would that difference in width affect turn in and steering responsiveness?
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01-11-2017, 01:38 PM | #14 | ||
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Other than that.. the two tires are not in the same class, the Cup 2 will offer better performance any day of the year, outside of cold / wet conditions, in which they aren't designed for. Again PSS = Street tire, CUP 2 = track tire that's "ok" to drive on the street. Cup 2s wear out fast, need warm weather in order to work to their potential. The performance of Cup2 >>>> PSS any day of the year. Doesn't matter what size PSS you choose the Cup 2 will still be better suited for performance, whether that be straight line grip / turn in / braking / heat capacity / etc. These two tires really shouldn't be compared, they serve entirely different purposes.. Quote:
Tread Width = The width of tread that can touch the ground, also known as the contact patch Lot of runflat tires or OEM tires have a larger section width to protect the wheel, but usually run thinner tread widths. Not sure why, but it's the case for a lot of OE tires.. (K1, Star Spec, etc) It could be due to the ability to fit chains. The problem with comparing section / tread widths between multiple manufacturers is they all measure themselves and report the numbers, but there is room for interpretation; click here http://www.tirerack.com/tires/tirete...jsp?techid=201 Comparing tire sizes under one manufacturer is more consistent. |
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01-11-2017, 02:40 PM | #15 | ||
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Edit:just read the tire rack link makes more sense. Thank you for the info helps a lot! |
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01-15-2017, 02:40 PM | #16 | |
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First of all thank you again for your input here...it's super helpful and much appreciated! To make sure I am on the same page, the general consensus is that switching to the wider(physically) 245 SC2 in the front will make the steering feel slightly heavier, and therefore turn in could be said to be less 'sharp', in spite of drastically higher grip levels, and the inherent increased cornering performance that goes along with that. Am I about right?
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01-15-2017, 05:48 PM | #17 | |
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Last edited by JamesGames; 01-15-2017 at 06:10 PM.. |
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01-16-2017, 06:28 PM | #18 | |
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Any suggestions for determining fitment/clearance with the wider SC2's without buying a $2k set of tires and hoping for the best?
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01-16-2017, 10:22 PM | #19 | |
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Another option for extreme performance summer tire is the Re71r. They make it in 245/35/20 and also in 295/30/20, for about half the cost of cup 2. Last edited by JamesGames; 01-16-2017 at 10:29 PM.. |
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01-18-2017, 10:40 AM | #20 | ||
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I will check out the Bridgestone as well. Would that be a similar width to the sc2 as discussed above?
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01-18-2017, 03:21 PM | #21 |
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Yea, similar, because the only size that they make to fit the front wheel would be 245/35/20. Tirerack lists widths as 9.8 and 9.1 for section / tread width respectively, and for 295/30/20 (the only size that would be "ok") is 11.9 and 10.7 for section / tread.
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01-20-2017, 06:32 PM | #22 |
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For what it's worth (and 19's), I went from 255/35/19 up front to 275/35, both MPSS Star Spec, and was worried turn in may numb a bit. To be honest, I ended up feeling that turn in bite was a bit more instant after making the swap. Full disclosure I only ran 255's for 1200 miles, and been on the 275 for 13k.
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