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      05-24-2020, 10:05 AM   #1
jra85
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Anybody Have 275/295 PS4S on Their ZCP?

I currently have a 275/295 PSS setup on my E92 ZCP (stock suspension), and it's almost time to order a new set. I've been reading that PS4S tires have a slightly wider shoulder than PSS, even though Tire Rack lists both with the same 11.9" section width and the PS4S having an 11" tread width versus 11.5" for the PSS. The PSS had a very slight rubbing on the rear fenders at near-full compression when they were new, so I don't think any wider will fit. Curious whether anybody has PS4S tires in these sizes on their ZCP (E90 or E92) so I know whether they'll fit. Thanks!
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      05-24-2020, 11:06 AM   #2
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I know some runs 275/30 front 295/30 rear but I really dont like the look and wouldnt run 295 on 10'' wheels. What is the reason you dont wanna run 255/35 F 275/35 R? Cheaper and safer plus I see that you live in NY and some roads are horrible there. I guess 255/275 option is better,safer and cheaper at least you'll have some meat.. Answering your last question is they do fit based on reading some guys post here..
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      05-24-2020, 09:45 PM   #3
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Quote:
Originally Posted by TrAcK TRaP View Post
What is the reason you dont wanna run 255/35 F 275/35 R?
I actually like the more flush/squared 275/295 look. From pictures the 255/275 setup still looks slightly stretched to me (even with PS4S tires), though I haven't seen many in person. Plus, to get the tire more flush with the fenders with the latter I'd need to run spacers. That said, I'd consider going to 255/275 if I can't confirm whether a 275/295 PS4S config will fit first.

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      05-24-2020, 10:07 PM   #4
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I run 295/30 Ps4s on the rear zcp wheels and zcp suspension and they do not rub for me.

I run 255/35 up front so can't speak to the 275 fitment but my size rubs very slightly on full wheel lock. Not enough to cause any damage or make me care about it. Would be curious if the 275/30 Ps4s ends up rubbing.
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      05-25-2020, 09:13 AM   #5
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Quote:
Originally Posted by m3jala View Post
I run 295/30 Ps4s on the rear zcp wheels and zcp suspension and they do not rub for me.
Thanks, that's good to hear. Can you post a couple pics? Interested to see whether there's a discernible difference in the shoulder when mounted on a ZCP wheel.

I'm pretty confident 275/30 PS4S would fit up front, I had no rubbing with that size in PSS. Just the rears were close.
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      05-29-2020, 05:52 PM   #6
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Quote:
Originally Posted by jra85 View Post
Quote:
Originally Posted by m3jala View Post
I run 295/30 Ps4s on the rear zcp wheels and zcp suspension and they do not rub for me.
Thanks, that's good to hear. Can you post a couple pics? Interested to see whether there's a discernible difference in the shoulder when mounted on a ZCP wheel.

I'm pretty confident 275/30 PS4S would fit up front, I had no rubbing with that size in PSS. Just the rears were close.
What about going 265/35/19 f and 285/35/19 r?

Not sure if that will work. I have a e92 zcp with stock suspension and stock zcp wheels, it's running the stock setup for tires but was thinking of going a little meatier. All I've seen is people running the 255/275 route.
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      05-30-2020, 10:34 AM   #7
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Quote:
Originally Posted by gh0stE92M3 View Post
What about going 265/35/19 f and 285/35/19 r?
I'm pretty confident neither of those sizes will fit well. There's numerous reports of 265/35 rubbing the liners and a few of 285/35 doing the same.

I actually got confirmation from mgmarsh39 in the "ZCP Love" thread that 295/30 PS4S will fit with no rubbing, which is what I was looking for. He has 255/35 up front, but 275/30 should fit fine in PS4S.

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      07-01-2020, 06:40 PM   #8
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Also here for some input. I'm on an E90, stock ZCP suspension and wheels.

I'm having major traction issues with my OEM size PS4S... Also looking to maximize sizes and it looks like 255/35 up front is best. As for the rear, looks like 275/35 or 295/30 are closest to OEM overall diameter... 285/35 and 285/30 are both over 2% different in size...

So, where's my best option??? Also, I'm running a 15mm spacer up front and 12mm in the rear... Will these have to go?

Thanks for the input...
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      07-05-2020, 10:03 AM   #9
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Quote:
Originally Posted by JupiterBMW View Post
Also here for some input. I'm on an E90, stock ZCP suspension and wheels.
If you do a 255/35 275/35 setup, I believe those size spacers will still be fine (do more due diligence by searching though). This is by far the most common non-OEM tire configuration on here for a ZCP. If you do a 255/35 295/30 setup (which skews the factory stagger difference of 20mm and might introduce more understeer), the spacers in the rear will definitely need to be removed. I don't think you can get away with any spacers in the rear with 295s.

As stated, I'm on 275/30 295/30 PSS now (without any spacers) with no issues. It's the closest to factory diameters and retains the same 20mm stagger while adding a good amount of width, at the expense of some tramlining due to the wide fronts and maybe a little less tight of a feel since they're on 9" and 10" wheels (0.5"-1" wider wheels would be ideal for these sizes). Since they're slightly shorter diameter than stock, it also yields a shorter effective gear ratio, so there's a slight acceleration benefit too
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      07-05-2020, 05:58 PM   #10
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Quote:
Originally Posted by jra85 View Post
If you do a 255/35 275/35 setup, I believe those size spacers will still be fine (do more due diligence by searching though). This is by far the most common non-OEM tire configuration on here for a ZCP. If you do a 255/35 295/30 setup (which skews the factory stagger difference of 20mm and might introduce more understeer), the spacers in the rear will definitely need to be removed. I don't think you can get away with any spacers in the rear with 295s.

As stated, I'm on 275/30 295/30 PSS now (without any spacers) with no issues. It's the closest to factory diameters and retains the same 20mm stagger while adding a good amount of width, at the expense of some tramlining due to the wide fronts and maybe a little less tight of a feel since they're on 9" and 10" wheels (0.5"-1" wider wheels would be ideal for these sizes). Since they're slightly shorter diameter than stock, it also yields a shorter effective gear ratio, so there's a slight acceleration benefit too
Perfect info, thank you! I'll stick with the 255/35 and 275/35 setup... I really just want a little more rear end rubber to handle the added torque...
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      07-05-2020, 07:46 PM   #11
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Quote:
Originally Posted by jra85 View Post
I'm pretty confident neither of those sizes will fit well. There's numerous reports of 265/35 rubbing the liners and a few of 285/35 doing the same.

I actually got confirmation from mgmarsh39 in the "ZCP Love" thread that 295/30 PS4S will fit with no rubbing, which is what I was looking for. He has 255/35 up front, but 275/30 should fit fine in PS4S.

No rubbing here! And just to confirm I am running KW Clubsport 2 way coilovers.
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      07-05-2020, 08:28 PM   #12
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i run 275/30 and 295/30's. they look good, but they are heavy and probably not the optimal size. these are only for the street though.
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      11-27-2020, 10:47 PM   #13
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Was just curious if you bought the ps4s tires in those sizes? If you did, thoughts and pictures?
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      11-28-2020, 09:29 AM   #14
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Quote:
Originally Posted by drwankel View Post
Was just curious if you bought the ps4s tires in those sizes? If you did, thoughts and pictures?
Not yet, decided to wait until next year. Still have the 275/295 Pilot Super Sports that I installed in 2013 on it (I only drive the car about 2k miles per year). Still happy with the sizes to go for the same in PS4S though.
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      06-11-2021, 06:59 AM   #15
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I'm about to pull the trigger on some PS4S in 275/30 19 & 295/30 19, can anyone confirm run/no rub on stock ZCP suspension and wheels?
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      09-28-2021, 06:17 PM   #16
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I have a 265/295 PS4S set up from when I bought the car a month ago with stock ZCP suspension/wheels - no rubbing whatsoever. Thinking of lowering on swift spec r springs next!

Last edited by seraphicassets; 09-28-2021 at 06:36 PM..
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