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      11-16-2018, 11:25 AM   #1
sojirovs
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Staggered Tire setup?

I am aware of the advantages of going squared setup for track duty, however, as I am not an expert nor go to track often enough, I am wanting to keep staggered setup with larger rubber.

So, if you were to choose any staggered setup, how would you do it?
I am open to any size (18 or 19 inch), and want to keep the car look good.
I plan to keep my zcp suspension for a while, so I am little bit worried 18 inch rim makes the car sit too tall. I haven't seen aftermarket 18 inch on stock zcp suspension in person, can you help me out?
Due to the fact 18 inch rims+tires will save some money and lighter, I was thinking to go with 265/285 or 295. Any better ideas?
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      11-16-2018, 12:47 PM   #2
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I have tried a bunch of different sizes over the years and have landed on 265/35/18, 295/30/18 as my current favorite size for a dual purpose car (street and track). I install them on 18x10, 18x11 wheels. This is primarily due to tire availability in these sizes. Cup2, TrofeoR, Yokohama A052, Toyo R888R to name a few. Plus they fit well - no rubbing the back of the front fender liner with with right offsets, and relatively easy fit of 295's in the rear.

The more die-hard track guys like to run square to squeeze every last ounce out of the tires (can rotate and keep wear more even on all 4). Some also feel that a square wheel/tire gives them the handling they desire (less understeer). From a handling standpoint I think that the extra grip present from the wider rear tire is welcome. Plus if you have adjustable suspension, sway bars, etc, you can dial in / out the understeer and oversteer to your liking. The fastest guys I see on local tracks with M3's are running 295 or even 305 square (dogbone for example) which I would consider as well. However that requires some extreme setup in the front and possibly removal of the fender liners (or fender liner death). I have gone as wide as 285 in the front with good results. All that being said the European cars (see Schirmer E92 M3) seem to run the 265/295 combo. You will find that the Schirmer cars are some of the most well respected on the Nurburgring.
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      11-16-2018, 01:12 PM   #3
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Quote:
Originally Posted by slicer View Post
You will find that the Schirmer cars are some of the most well respected on the Nurburgring.
I will definitely check out that car. Thanks!
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      11-16-2018, 01:27 PM   #4
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Quote:
Originally Posted by slicer View Post
I have tried a bunch of different sizes over the years and have landed on 265/35/18, 295/30/18 as my current favorite size for a dual purpose car (street and track). I install them on 18x10, 18x11 wheels. This is primarily due to tire availability in these sizes. Cup2, TrofeoR, Yokohama A052, Toyo R888R to name a few. Plus they fit well - no rubbing the back of the front fender liner with with right offsets, and relatively easy fit of 295's in the rear.

The more die-hard track guys like to run square to squeeze every last ounce out of the tires (can rotate and keep wear more even on all 4). Some also feel that a square wheel/tire gives them the handling they desire (less understeer). From a handling standpoint I think that the extra grip present from the wider rear tire is welcome. Plus if you have adjustable suspension, sway bars, etc, you can dial in / out the understeer and oversteer to your liking. The fastest guys I see on local tracks with M3's are running 295 or even 305 square (dogbone for example) which I would consider as well. However that requires some extreme setup in the front and possibly removal of the fender liners (or fender liner death). I have gone as wide as 285 in the front with good results. All that being said the European cars (see Schirmer E92 M3) seem to run the 265/295 combo. You will find that the Schirmer cars are some of the most well respected on the Nurburgring.

Slicer,
What did you have to do to run 285 up front. I want to run 285 square. I'm getting a set of JRZ installed tomorrow.
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      11-17-2018, 01:45 PM   #5
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Quote:
Originally Posted by Dr. Dre View Post
Slicer,
What did you have to do to run 285 up front. I want to run 285 square. I'm getting a set of JRZ installed tomorrow.
-3 to -3.5 camber in the front and I did it with both 10 et15 wheels and 10.5 et12 wheels. Aggressive offset was required to clear my coilover on the inside. The 10.5" wheel rubbed the back of my fender liner - especially on the passenger side. Others with JRZ have claimed that inner clearance is not an issue with their kits. Therefore (if that is accurate) you could use as high as 10.5 et22 without spacers.
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      11-18-2018, 06:39 AM   #6
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I run 18x9.5/10.5 — an inch wider than stock. I run 265/35/18 front and 285/35/18 or 295/30/18 rears, with the 265 and 285 combination bring about 3/4 inch wider than stock and nearly matching the wheel width increase.

The 295 rears on 10.5 might be a little oversized for the wheel width for best handling. But for most people it won’t matter. Also, I have rubbed slightly with the 295s when my car is loaded but that may be due to the offset. I have Apex ARC8 - reasonably priced, light and pretty durable. Had mine for 8 years and have a set on my other car that is a little older.
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      11-19-2018, 04:26 PM   #7
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Slicer's post is accurate. OP, since you are going to run stock ZCP suspension (for now) and you do not track the car extensively, I would recommend the following staggered wheel and tire setup:

Front: 18x9.5" ET22 - 265/35-18
Rear: 18x10.5" ET22 (or ET27) - 285/35-18

These tire sizes are available in the popular Michelin PS4S, and everything will be a direct fit. Should you decide to upgrade your suspension in the future to a set of coilovers, your front wheel specifications will allow plenty of room inboard (even for KW and Ohlins which are known for taking up extra room).

This is by far the most popular bolt-on staggered fitment for the E9X M3 chassis.

- Ryan
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      11-21-2018, 10:53 AM   #8
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I'm using my stock 19" ZCP wheels for my track wheels. Would a 295/30/19 fit ok on the 10" wide rear wheel and into the wheel well? I was thinking of the Cup 2 tires (with a 255/35/19 front).

It's that or I go with RE71R tires in 255/35/19 and 275/35/19 sizes. The 295/30/19 is 0.6" less diameter so was thinking it would give me a better gear ratio.

Last edited by Dreamer99; 11-21-2018 at 11:19 AM..
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      11-21-2018, 01:06 PM   #9
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Quote:
Originally Posted by Dreamer99 View Post
I'm using my stock 19" ZCP wheels for my track wheels. Would a 295/30/19 fit ok on the 10" wide rear wheel and into the wheel well? I was thinking of the Cup 2 tires (with a 255/35/19 front).

It's that or I go with RE71R tires in 255/35/19 and 275/35/19 sizes. The 295/30/19 is 0.6" less diameter so was thinking it would give me a better gear ratio.
I would not recommend a 295 on a 10" wheel. Especially for track use. I would want at least a 10.5 or 11" (even better). Also, you are increasing the stagger and understeer tendencies unless you have adjustable suspension or sway bars to counteract.
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