10-23-2014, 04:54 PM | #67 | ||
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10-23-2014, 04:58 PM | #68 |
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Drives: 2018 San Marino Blue/SO M3 6MT
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I don't think it will be safe but I could be wrong.
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2018 San Marino Blue/SO M3 6MT
2015 SO/BLK M3 6MT (sold) 2011 AW/BLK M3 6MT (sold) |
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10-23-2014, 05:01 PM | #69 |
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Thank you very much for all the help and I hope maybe someone went or will go with nokians as in most snowy parts of Europe it might be a popular choice.. Pls let me know what sizes you guys choose. Thanks!
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10-23-2014, 05:21 PM | #70 | |
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If you wanted to go with a square setup (all the same size), you'd put the front tires all the way around. The square setup is what tirerack.com is recommending with 18" aftemarket rims. And because most of the 18" rims they have in their winter fitments are 8" wide, it forces us to use the 245 width. If it were me, I'd go with 245/45/18 as it matches the rear O.D. and is the taller tire... that 1/4" extra ground clearance might help . And the sidewall being larger will help make the fender to wheel gap look smaller. |
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10-23-2014, 05:23 PM | #71 |
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I'm 99% sure I'm going with this fro tirerack...
Wheels - 18x8 Rial Quinto 35mm offset = $169ea Tires - 245/45/18 Hankook Ventus S1 Noble2 = $149ea No TPMS - will deal with light for 2 months $1272 - $60 mail rebate = $1212 + shipping ($130ish). |
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10-23-2014, 05:55 PM | #72 | |
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http://f80.bimmerpost.com/forums/sho...d.php?t=104826 |
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10-23-2014, 06:16 PM | #73 |
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10-24-2014, 01:53 AM | #74 |
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10-24-2014, 10:59 AM | #75 | |
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If BMW recommend 255, and i go with 245 all around on square. Does anyone see an issue with this? Thanks! |
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10-24-2014, 11:32 AM | #76 |
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No, you will just be running a slightly less wide, slightly less tall tire.
Traction is going to be an issue no matter what on this car on snow tires. It will be a slightly worse issue with a slightly smaller contact patch, which you will have in both straight and lateral movements with a 245/40/18 vs. 255/40/18
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10-24-2014, 11:34 AM | #77 |
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So, question about offsets and spacers:
Tirerack is offering an 18x9 rial p10 wheel running a square 255/40/18 setup. However, the offset to these wheels is 40...about 11-13mm further IN (towards the center of the car) than the BMW recommended setup. So if I ran a 12mm spacer, could I not essentially achieve the BMW-recommended offsets/wheel placement - assuming they fit? |
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10-24-2014, 06:14 PM | #79 |
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Can anyone take a few pics of their 640Ms and post them? I am having a hard time visualizing these wheels with the CAD like drawing the dealer sent me.
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10-25-2014, 06:55 AM | #80 | |
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You can test different configurations here: http://www.rimsntires.com/specspro.jsp M |
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10-25-2014, 03:23 PM | #81 | |
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10-25-2014, 03:45 PM | #82 | ||
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10-25-2014, 03:47 PM | #83 |
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10-25-2014, 03:53 PM | #84 | |
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I need winter tires and best grip on snow. From my research one of the best is Nokian R2, but the closest sizes I have found is 245/45/18 and 255/45/18. I am very close of going 255/45/18 and my only concern is will it fit the rear rim fine and will it rub because I am lowered on H&R springs and do not want to swap springs to stock for winter. |
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10-25-2014, 05:04 PM | #85 |
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I actually changed my mind. The 255/45R18 on the 640M wheels *MAY* be slightly tight, when turning the front wheel or going over a pothole. I say MAY cause it probably is a negligible amount...but I didn't want to take that chance.
So today I ordered the BMW-recommended 640M wheels, and will put 245/40R18 Nokian R2 all around. 245mm tires will fit on the 8.5inch and 9inch wide wheels fine--it's within the Nokian spec. I know I could've saved money by going with the Rial tires, but my dealer gets me deep discount pricing on the wheels since I've bought 4 BMWs from them. So I'd rather get the OEM 640M wheels. Makes for better resale in the future as well. M |
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10-26-2014, 07:50 PM | #86 | |
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10-27-2014, 08:12 PM | #88 |
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Thanks for this thread, found it really helpful as I was researching my first winter setup. I recently ordered BBS SR 18x8 wheels from tire rack, and 245/45/18 Nokian Hakka2 for square setup. Feeling much better about the move to rear wheel as winter approaches.
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