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      10-17-2018, 09:40 AM   #23
CosmosMpower
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Originally Posted by dcgolfdr View Post
18x9.5 +28 or even +35 with a 5mm spacer with 275/35/18 will fit up front? I have camber plates and M perf. coils. Ideally I would like to run this setup.
It should, depends on your ride height. I was stock with -2.75 camber up front and it fit a 285/30/18. If it was lowered it would probably hit. The 275 will probably clear if lowered, not 100% sure. I was running an aggressive +25 offset on a 18x10.
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      10-17-2018, 10:20 AM   #24
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Originally Posted by ashburyn54 View Post
If your looking for max sizing in a 9.5 I would go with an NT01 265/40r18 squared or RE-71 in similar sizing. That's a 26.3 diameter and equal to the 265/35r19 front tires I ran. That was as far as I could go diameter wise in the front. I like a larger sidewall and I think they will look even better in an 18. That's a very similar size to a Pirelli or Michelin Cup car slick sidewall wise.

Going with a 265/35r18 means you will loose almost an inch of sidewall.
I think this is a less common set up. More sidewall tends to soften the car and increase transition time and raises the CG slightly . With only coilovers and camber plates with the R-1 in 265/35/18, my car took second place in TT4 at Road Atlanta and Barber....not bad considering it weighs 600lbs more than the other ( full race) cars!
That's amazing! I'm by no means an expert, I just know the look I enjoy and that e46 m3 18" style with 40 series sidewalls gets me going! I drove my car a ton on the street so the extra sidewall was appreciated.

If I were to do it again I would probably run 275/35r18 square on 10's. Or 275/35 FR and 275/40 rear if I didn't care about rotation.
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      10-17-2018, 10:24 AM   #25
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Originally Posted by CrashFL View Post
I did a lot of research recently for a track setup (ZM2 and Twt, I read a lot of your posts along with a few others). Went with a staggered 18" setup and RE-71Rs. In the wet, they're not nearly as good as the Pilot 4S I use daily and have tracked, but in the dry they're a huge step up. More grip than I expected for a trackable street tire. However, the outside shoulder of the fronts have worn really quick, so I'm installing camber plates before the next track day. If you're not going for slicks and want to drive your track tires to the track, the RE-71R is an optimal choice.
It's close to a race tire compound in a street tire tread. 71R was built for autocross to be fast on the first run even when the tires are not up to temp. Durability is not good. For WRL 8 hour enduro they only last 1 day vs 2 full + days with Hankook RS4.
Agreed. I thought the new RS4 was a really good match for this car when I was shopping. Plus the sidewall vs the rs3 is a little shorter allowing a size up without rubbing splash guards up front. I believe the 275/35r19 I looked at was only 1/10" larger in diameter vs the Bridgestone in a 265/35r19. Not sure if that translates to 18" sizes.
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      10-17-2018, 12:45 PM   #26
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I run 275/35 18 square NT01s on Apex SM-10 18x10 33ET (12mm spacer up front). Lowered about an inch on Bilstein PSS10 coilovers and with 3.2 negative camber. No rubbing issues.

Very happy with the setup. With the ability to rotate the NT01s i'm getting consistent wear across the tire and a very long overall tire life. Will be sticking with this setup unless I decide to explore full slicks.
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      10-17-2018, 01:17 PM   #27
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Originally Posted by Twt View Post
In the end I really like the G-force R-1 in 265/35/18 square....with a 5 mm spacer up front to clear the coilovers. These tires are fast, durable and predictable. I have run Hoosier R7 in 275 square but had to run a larger spacer and had rubbing...
Twt, came here looking for exactly this, thanks! Also joined in on the Apex group buy for a 18” square set and was wondering if the 275/35 R7 would fit stock w/ camber plates, or find some feedback on the R-1. Sounds like R-1 are worth a try!

Living just below Canada I need to ask...is it spring yet?
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      10-17-2018, 01:23 PM   #28
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Nobody’s mentioned Michelin Cup 2 yet, anybody tired them on the M2? I just got sick of the short life span of the RE-71R and have been doing some testing/research in a GT350R. The grip is comparable, with Cup 2 seemingly having better heat tolerance and longevity. They’re more expensive, but seem as though they’d ultimately be less expensive if they lasted an extra event.
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      10-17-2018, 01:35 PM   #29
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Originally Posted by TimOudin View Post
Nobody’s mentioned Michelin Cup 2 yet, anybody tired them on the M2? I just got sick of the short life span of the RE-71R and have been doing some testing/research in a GT350R. The grip is comparable, with Cup 2 seemingly having better heat tolerance and longevity. They’re more expensive, but seem as though they’d ultimately be less expensive if they lasted an extra event.
Had SC2s (on oem wheels in oem sizes) prior to the NT01s. Would not buy the Michellins again. My experience was that they are super expensive, not as much overall grip as the NT01s and horrible life. Corded outside edges in 2-3 HPDEs with the rest of the tire looking good. On the plus side, they can function as a street tire (which the NT01s cannot) and are acceptable in the wet.
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      10-17-2018, 02:19 PM   #30
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Originally Posted by dvas View Post
Had SC2s (on oem wheels in oem sizes) prior to the NT01s. Would not buy the Michellins again. My experience was that they are super expensive, not as much overall grip as the NT01s and horrible life. Corded outside edges in 2-3 HPDEs with the rest of the tire looking good. On the plus side, they can function as a street tire (which the NT01s cannot) and are acceptable in the wet.
Yeah, a bit of an apples v. oranges comparison, plus the price on those NT01 aren’t going to be best anytime soon!
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      10-17-2018, 02:23 PM   #31
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Quote:
Originally Posted by dvas View Post
Had SC2s (on oem wheels in oem sizes) prior to the NT01s. Would not buy the Michellins again. My experience was that they are super expensive, not as much overall grip as the NT01s and horrible life. Corded outside edges in 2-3 HPDEs with the rest of the tire looking good. On the plus side, they can function as a street tire (which the NT01s cannot) and are acceptable in the wet.
Cup2's can't really function as a street tire any more than a NT01 with tread can. They are both noisy, horrible in water and not durable. Plus if you drive them around on the street you'll just heat cycle them out.
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      10-17-2018, 10:55 PM   #32
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Quote:
Originally Posted by TimOudin View Post
Twt, came here looking for exactly this, thanks! Also joined in on the Apex group buy for a 18” square set and was wondering if the 275/35 R7 would fit stock w/ camber plates, or find some feedback on the R-1. Sounds like R-1 are worth a try!

Living just below Canada I need to ask...is it spring yet?
It's great to get so much input...although you can tell there will not be a complete consensus. I tried the 275/35/18 R7 square and had excellent lap times, but, the lack of clearance ( even with camber plates and 12mm spacers) created rubbing with high compression. For example going through turn 1 at Road A , a fast ( 90mph) right hand sweeper uphill with positive camber, created tire contact....whereas the same set up at Sebring is fine. I just like the 265/35/18 set up....lots of tire options and easy set up. I am also not a fan of the SC2 tires.
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      10-24-2018, 09:22 AM   #33
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Quote:
Originally Posted by TimOudin View Post
Yeah, a bit of an apples v. oranges comparison, plus the price on those NT01 aren’t going to be best anytime soon!
Not sure why you think it's not a fair comparison. Both are DOT compliant for competition designed tires under 200 treadwear. If anything, I would have expected the SC2s to have some more positive attributes given they cost almost twice as much and that they come as OEM on a number of vehicles. I would choose NT01 over SC2s in every scenario except driving in the rain.


Quote:
Originally Posted by CosmosMpower View Post
Cup2's can't really function as a street tire any more than a NT01 with tread can. They are both noisy, horrible in water and not durable. Plus if you drive them around on the street you'll just heat cycle them out.
I drove SC2s on street/track all of last year and my experience was that yes, they are noisy, stiff, and almost unacceptable in rain. I didn't experience any heat cycling issues. Having said that, I would have no problem driving SC2s on the street other than they are over-kill for anything anyone would need for street driving and that they are overly expensive. NT01s on the other hand squarely belong on track.
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      10-25-2018, 08:47 AM   #34
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Anybody here used Dunlop Direzza 11 Star Spec track tires? There is also a Direzza 111 which seems to have replaced it. Tire Rack has a close out special on them.
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      10-25-2018, 09:51 AM   #35
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Quote:
Originally Posted by dvas View Post
Not sure why you think it's not a fair comparison. Both are DOT compliant for competition designed tires under 200 treadwear. If anything, I would have expected the SC2s to have some more positive attributes given they cost almost twice as much and that they come as OEM on a number of vehicles. I would choose NT01 over SC2s in every scenario except driving in the rain.




I drove SC2s on street/track all of last year and my experience was that yes, they are noisy, stiff, and almost unacceptable in rain. I didn't experience any heat cycling issues. Having said that, I would have no problem driving SC2s on the street other than they are over-kill for anything anyone would need for street driving and that they are overly expensive. NT01s on the other hand squarely belong on track.
Take a fresh set of SC2, measure with a durometer. Drive them on the street for about 100 heat cycles, measure again. Report back.
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      10-25-2018, 09:52 AM   #36
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Quote:
Originally Posted by Twt View Post
It's great to get so much input...although you can tell there will not be a complete consensus. I tried the 275/35/18 R7 square and had excellent lap times, but, the lack of clearance ( even with camber plates and 12mm spacers) created rubbing with high compression. For example going through turn 1 at Road A , a fast ( 90mph) right hand sweeper uphill with positive camber, created tire contact....whereas the same set up at Sebring is fine. I just like the 265/35/18 set up....lots of tire options and easy set up. I am also not a fan of the SC2 tires.
You probably have the wrong wheel offset, too tall a profile or you're lowered. I fit 285/30/18 R6's with no issues. The R7's are a bit wider than the old R6.
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      10-25-2018, 10:38 PM   #37
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Quote:
Originally Posted by CosmosMpower View Post
You probably have the wrong wheel offset, too tall a profile or you're lowered. I fit 285/30/18 R6's with no issues. The R7's are a bit wider than the old R6.
I know it's not a wheel or offset issue. I have the car lowered, corner balanced with slight rake....I can raise the car and fit the R7s better but on balance I like this set up for my driving style. I find the 265/35 gives me good turn in and traction. My friend has a FBO version and needs 305 on the rear just to get traction....but my stock DCT has just the right amount of slip with 265/35.
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      10-27-2018, 02:55 PM   #38
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My opinion after one year of M2 tracking is:
RE-71R:
As many have said the RE-71R is probably one of the fastest tires, but you can easily destroy the shoulders during a single event. I re-mounted mine left to right after each event and they only lasted 3 events. I will keep buying them as a autox tire but not for track events.
Hankook RS4S:
I found them slightly lacking in terms of grip compared to the Bridgestone, but they stood up to track abuse much better. I'm probably a slight bit slower overall but they still let the M2 shine. These are my track day tires.
Conti ECS:
These are an excellent wet weather autox and daily tire. I've put them on the stock 19" rims and use them for the winter season autox here on the wet coast. If it is even remotely dry I usually put on my RE's as they autoperform the ECS even in cold but dry weather
CS2:
This was my initial track tire choice but I run a 18" Apex EC-7 rim and I find the CS2 availability in 18" to be extremely limited.

I should mention that all my tires are 10mm bigger than stock. so 255/35R(18 or 19) and 275/35R(18/19) depending on the rim.
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      10-27-2018, 04:20 PM   #39
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Quote:
Originally Posted by CosmosMpower View Post
Take a fresh set of SC2, measure with a durometer. Drive them on the street for about 100 heat cycles, measure again. Report back.

, Ok, I’ll go do that right now.

Thanks, I’ll just go off my lap times with multiple sets of SC2s across 15+ track days and 5,000+ road miles last year and the fact that they come as OEM tires on many road cars.
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      10-27-2018, 11:20 PM   #40
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Quote:
Originally Posted by dvas View Post
, Ok, I’ll go do that right now.

Thanks, I’ll just go off my lap times with multiple sets of SC2s across 15+ track days and 5,000+ road miles last year and the fact that they come as OEM tires on many road cars.
I'm a fan of the SC2, I track with them on my M2, they are a great tire for performance under the right conditions. The reason they are on so many performance cars is those cars get tested on track and those magazine articles sell cars. If you live in a climate with 4 seasons they are useless for 2 of those seasons so they are not a great choice for a daily tire. For me the sweet setup is the 4s for daily use and Cup2 for track. Having said that most of the performance cars that are sold with the Cup2 tires are not cars that are driven daily (rare exceptions of course).
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      11-05-2018, 11:44 AM   #41
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Any suggestions on 19's as the comp won't fit the 18 apex from the group buy?

I like RS4 and RE71 so hopefully they will have a size that fits recommended square setup on 19" wheels. May be too soon to know this but I would like to order some wheels/tires soon....
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      12-01-2018, 08:22 AM   #42
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Based on reading the opinions and experience of seasoned M2 drivers here, it looks like the consensus is 265/35/18 or 275/35/18 square for track use. I have a question that is bothering me from a theoretical/engineering perspective. While this size mantains the stock diameter in the front compared to the OEM tire (245/35/19), it reduces it on the back wheels that are the powered ones with the differential.

Besides the somewhat odd cosmetics of this, I am wondering what impact this has on performance as we are effectively changing the gearing and the tire has to complete more rotations to cover the same distance. I am sure I am over thinking it, but curious to hear what the experts here have to say. TIA.
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      12-01-2018, 01:04 PM   #43
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Quote:
Originally Posted by pal View Post
Based on reading the opinions and experience of seasoned M2 drivers here, it looks like the consensus is 265/35/18 or 275/35/18 square for track use. I have a question that is bothering me from a theoretical/engineering perspective. While this size mantains the stock diameter in the front compared to the OEM tire (245/35/19), it reduces it on the back wheels that are the powered ones with the differential.

Besides the somewhat odd cosmetics of this, I am wondering what impact this has on performance as we are effectively changing the gearing and the tire has to complete more rotations to cover the same distance. I am sure I am over thinking it, but curious to hear what the experts here have to say. TIA.
I think for dsc to work as designed, the rear tire diameter % difference over front should be maintained. With traction and dsc off this doesn't matter. You'll just run out of gears faster with smaller diameter tire.
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      01-30-2019, 08:00 AM   #44
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Quote:
Originally Posted by DOMs335D View Post
My opinion after one year of M2 tracking is:
RE-71R:
As many have said the RE-71R is probably one of the fastest tires, but you can easily destroy the shoulders during a single event. I re-mounted mine left to right after each event and they only lasted 3 events. I will keep buying them as a autox tire but not for track events.
Hankook RS4S:
I found them slightly lacking in terms of grip compared to the Bridgestone, but they stood up to track abuse much better. I'm probably a slight bit slower overall but they still let the M2 shine. These are my track day tires.
Conti ECS:
These are an excellent wet weather autox and daily tire. I've put them on the stock 19" rims and use them for the winter season autox here on the wet coast. If it is even remotely dry I usually put on my RE's as they autoperform the ECS even in cold but dry weather
CS2:
This was my initial track tire choice but I run a 18" Apex EC-7 rim and I find the CS2 availability in 18" to be extremely limited.

I should mention that all my tires are 10mm bigger than stock. so 255/35R(18 or 19) and 275/35R(18/19) depending on the rim.

If you could only pick ONE SET of tires between Conti ECS and RE71 for a daily driver with a few yealy autocross events, which one would you pick?That's my conundrum now, as my stock super sports are done.
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