07-07-2019, 04:50 AM | #1 |
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M4CS tyre choice
My M4 CS came with pilot super sport tyres rather then pilot sport cup 2 tyres.
Was thinking of swapping over and it will be a daily tyre. Can anyone advise what the wet weather grip is like for sensible daily driving ? |
07-08-2019, 08:31 AM | #2 | |
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Wet is fine, it's the cold they don't like. Under 10 and they're pretty skatey. You'll also notice they ride firmly and can be noisy on some coarse chip.
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07-09-2019, 04:42 AM | #4 |
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My M4cs is shod with PSC2. The PSC2 are decent enough in the wet. I drove them in pretty heavy downpoors and they worked well enough with not real aquaplanning issues. When they are up to operating temp, they offer very decent wet grip. I also drove on them in temperatures just above freezing last fall before swapping out to my winter setup, while they definitely felt harder and less grippy, they still worked decently for the daily drive to work. However, they are really bad when it is cold AND wet. I could still manage, but with a lot of restraint. Any small probe of the throttle would sent the rear sideways.
My M4cs was mistakenly delivered with the PSS instead of the PSC2. I drove on the PSS for the first 10-days after delivery before the dealer swapped the tires to PSC2, which gave me a good back-to-back appreciation of the different tires. I can attest that the PSC2 really enhance the CS driving experience. They make the car feel like a much more cohesive package. That being said, I am still considering replacing them with PS4S when they will be worn out. Since I already have another dedicated "dry track" set of wheels and tires, what I need is a DD and "wet track" setup. The PS4S would better fit that bill. I am still debating...
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07-09-2019, 04:54 AM | #5 | ||
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I almost took the plunge with cup 2s but have decided on the 4S tyres. Might go with a dedicated track set of wheels and tyres. What wheel setup do you use on track ? |
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07-09-2019, 05:00 AM | #6 | |
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What sizes are you considering for the PS4S?
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07-09-2019, 05:04 AM | #7 | ||
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255/35/19 front 285/30/20 rear The cup 2s would have Been 265/35/19 front 285/30/20 rear I might buy a set of stock CS wheels and run cup 2s on them for track days |
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07-09-2019, 05:13 AM | #8 | |
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While the 265/35R19 PS4S is fine with 9.6" of tread width, I find the 285/30R20 PS4S a bit narrow at 9.9". I am considering going with the 295/30R20 instead that has an 11.1" tread width. Cup2 are bloody expensive for track only tires. They are really meant as dual use tire.
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07-09-2019, 05:21 AM | #9 | ||
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As far as the 4S tyres go, it's a little unclear but my aim is to try and stick to the PSS sizing. The 4S would only really be the daily driving tyre with occasionally twisty bit fun wet or dry. I could then swap the track wheels directly prior the dry track day and then back to 4S for daily driving. Hopefully a set of oem CS wheels will become available at a decent price. I do a lot of motor way driving with heavy rain and the combination of cold and wet as well as standing water makes me a little nervous about the cup 2 as a daily |
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07-09-2019, 05:54 AM | #10 | |
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07-09-2019, 11:48 AM | #11 |
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Consider RE71Rs. Although I use the same track setup as CanAutM3 and love it (EC-7 + NT01), a few people whose opinions I really value seem to prefer the RE71R over the NT01.
Also the new Eagle F1 Super Sports are coming Q4 of this year and should be outrageous. |
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07-09-2019, 11:49 AM | #12 |
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07-09-2019, 12:25 PM | #13 | |
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The RE71R is a damn impressive tire. I came across an M3cs at WGI in May that was running RE71R and I struggled to keep pace with him with my NT01 (he's also a bloody good driver). Too bad they don't have a good RE71R fitment for my rear 18x11 wheels, otherwise I would have given them a try.
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07-10-2019, 05:16 AM | #14 | ||
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Do you know what that stagger is with 4S tyres 255/35/19 and 285/30/20? |
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07-10-2019, 05:25 AM | #15 | |
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I am not sure why you say a 255 would improve turn-in though?
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07-10-2019, 05:47 AM | #16 | ||
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01-31-2020, 07:38 PM | #17 | |
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01-31-2020, 09:01 PM | #18 | |
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However, if you favour a more street friendly setup, particularly for the wet, the 295/30R20 generic PS4S is a good option for a more balanced handling when paired with the front 265/35R19 PS4S. There are two 295/30R20 PS4S, ensure you select the generic one though and not the M01.
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02-10-2020, 06:08 PM | #19 |
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Just wanted to add my experience so far with this setup:
Currently running PS4S 265/35R19 and 295/30/R20. I had SS 285's in the rear paired with the PS4S 265's in front while I was waiting for the PS4S 295's to come in, and while I am no expert, I felt the 295's in the rear were better matched not only aesthetically, but dynamically. This past weekend I went with a more aggressive -2.4 rear camber (factory was -1.75 after MPHAS installation). -2.7 in front. That paired with corner balancing has changed the handling characteristics of the car noticeably. The goal was to increase front end grip and tame that rear end on high speed cornering. I'll report back in a few weeks after I hit the track again.
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02-10-2020, 08:39 PM | #20 | |
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As for the tires, my M4cs came with PSC2 (I am in Canada). The 265/35R19 with 295/30R20 PS4S was the setup I originally wanted to get after my PSC2 had worn out. I figured I already had a dedicated set of tires and wheels for the dry track and needed a DD friendly tire as well as a wet track tire, hence the PS4S. However, after a full season of driving on the PSC2, I decided to stick with them. I heard all sort of stories about how horrible they are in the wet, but a very wet track day proved this to be completely wrong. I was quite impressed with the performance of the PSC2 on a drenched track. I like the added crispness and grip the offer on the DD and they perform well enough on the wet.
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02-10-2020, 09:07 PM | #21 | |
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I'll take that into consideration. West End Alignment, which is the most reputable shop in my area recommended the -2.4 rear camber and I trust them. What was your rear camber from the factory I wonder? According to the shop, with the MPHAS I was at: -2.75 driver front, -2.3 passenger front, 3/32 toe out in the fronts. -1.75 driver rear and -1.7 passenger rear with 0 toe in the rears.
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02-11-2020, 05:57 AM | #22 | |
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IIRC, the stock rear camber on my 2015 M4 was at -1.9. Optimal alignment is a variable thing, it depends on many factors such as driving style, track layout, tires, suspension tuning, etc...
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