03-23-2018, 03:24 PM | #45 |
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@bimmer4life24 I had the same setup in mind as @alscks0414 but with 437. Unfortunately today I found out that I'll have to stick with stock size. I called a professional installer and they explained to me how the laws are still quite strict here in Italy. The car comes with a registration certificate that lists the allowed tires and the process to re-certify with a custom size is extremely obnoxious. I could just do it and ignore all that, but in practice I risk insurance not covering, in case they found the car with non-certified tires. This could get ugly very fast. I figured eventually I could keep a 'trackday' set in that size and swap at the track.
I hope you have better flexibility in Canada. Go for the 255/275. |
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03-23-2018, 03:42 PM | #46 | |
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That's strict. |
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03-31-2018, 05:47 PM | #47 | |
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04-01-2018, 06:31 AM | #48 | |
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Will take some pics tomorrow, it's night now... To my eye they look to have more sidewall than just the extra 35% of the 10mm extra width. I put this down to the removal of the stretch. Will dig out some old before shots too. Edit. Sorry lousy shots, too late and the car is filthy, lots of rain at the moment. Last edited by Doji desu; 04-16-2018 at 02:43 AM.. |
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06-24-2018, 05:02 PM | #49 | |
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MJ |
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06-24-2018, 06:43 PM | #50 |
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For clarification, I did not see it mentioned previously, the sidewall measurement on a tire (the second number) is the ASPECT RATIO, hence a "35" is 35% of the width, hence increase in width correlates to increase in height or overall diameter
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12-27-2018, 06:55 AM | #51 |
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255/35 & 275/35 in R19 seem to be OEM in some countries ...
http://www2.bmw.com.au/spec-guide/bmw-m2-spec-guide.pdf CH |
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12-27-2018, 07:33 AM | #52 | |
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12-29-2018, 09:06 PM | #53 |
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I'm pretty sure the ABS wheel speed sensors will compensate for changes in rolling diameter so I wouldn't worry about any issues going with the M3/M4 OEM tire size.
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12-30-2018, 04:03 AM | #54 |
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Would 255/35/19; 275/35/19 437Ms work on an M2C?
I thought I read some M2C owners rubbing in the front with 255/35/19?
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12-31-2018, 11:45 AM | #55 |
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12-31-2018, 11:56 AM | #56 | |
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I should have added, 437M with 245; 265/35/19
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01-08-2019, 06:31 PM | #57 |
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01-09-2019, 11:08 AM | #58 | |
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I ended up getting an M3CS instead
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01-12-2019, 07:05 PM | #59 |
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M2C with 255/35-19 and 275/35-19 MP4S. Much better fitment than the stock tires. Sorry for the dirty car!
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01-13-2019, 07:22 AM | #60 |
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Are you using the RE-71R for normal street duty? I hate the "sizzle" of the RE-71R over certain types of pavement and over all lane markings, etc (tire engineer speak for the trapped compression of air in tread) in addition to all the other road noise they create. I have a set for my E90 M3 I use for events only, and switching back to the regular street wheels/tires (PS4S) is an amazing transformation for normal street driving (much quieter, more comfortable, but still great street performance).
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01-13-2019, 12:47 PM | #61 | |
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With all that said, what caught my attention is that I want to go with 18" wheels. They are more go than the 19s for show and perform better on bad roads. However the wheels I like only come in 9.5" wide front and 10.5" rear. Everyone goes with smaller diameter 265 and 285s but I don't like that. That is great for normally aspirated high revving cars that need to spool up quickly but in our cars with big torque we are actually shortening up the powerband a bit and recording extra miles on the car due to the smaller diameter. The more appropriate 275 and 295 sizes are marginal, can rub and the extra weight can blunt performance. So I was also thinking slightly larger diameter M3 sizes 255-40-18 and 275-40-18 might be the best compromise but I have not found anyone to have run this yet and it would be an expensive test. The F80 M3s run these sizes and use the same offsets so it would be a simple test for you to find someone with an M3 and just try these out on the M2. The car has enough torque for the slightly larger diameter and slightly heavier tire but my educated guess is that you really won't gain much since what makes the M2 special is the balance the M guys put into the car. Changing the tire sizes will probably upset that balance everyone raves about. |
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01-14-2019, 04:15 AM | #62 |
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01-14-2019, 03:53 PM | #63 | |
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01-14-2019, 09:42 PM | #64 |
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Various tire specs by: Tire/size/section width/tread width/diameter/revs per mile
OEM PS4S 245-35-19/ 9.8/8.6/25.8/807 265-35-19/10.7/9.6/26.3/790 OEM Conti 245-35-19/ 9.8/8.7/25.8/805 265-35-19/10.7/9.4/26.3/790 RE-71R 255-35-19/10.2/. 9.3/26.0/801 275-35-19/10.9/10.0/26.6/784 265-35-19/10.7/.9.6/26.3/791 285-35-19/11.4/10.1/26.8/775 18" Hankook R-S4 245-40-18/10.1/9.1/25.6/811 265-40-18/11.0/9.7/26.2/793 Notes: 1. Section width and tire diameter can create rubbing issues. 2. Taller tire diameter with lower revs per mile impacts gearing and speedo accuracy.
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01-27-2019, 07:40 PM | #66 | |
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