10-14-2019, 11:04 AM | #1 |
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Replacing OEM 225/45R19 Tires
I am seeking advice on replacing the original RFTs that came with the M35i. Do you guys think the following tires will fit without issues?
235/50R19 or 225/55R19 When comparing dimensions online, there does appear to be some difference in diameter and width. https://tiresize.com/comparison Any thoughts are appreciated. |
10-14-2019, 05:40 PM | #3 |
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Your speedometer will be way off. Just curious why you would want to go with those sizes - neither will handle better and both could handle worse on top of having your speedo be way off. I was contemplating 235/45/19s or 255/40/19 - the 255/45/19 has almost the same circumference as the 225/45/19s.
Here is a tire size calculator: https://www.discounttiredirect.com/l...ize-calculator |
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10-14-2019, 07:14 PM | #4 |
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Thinking of replacing the summer RFTs with All Weather tires. For one thing, I want to avoid having to replace and store winter tires every year. And second since I can't drive like a madman in the city, I am questioning whether I even need ultra high performance tires on my 35i.
It's not like I'm checking my 0-60 time every weekend. In lieu of RFTs, the plan is to purchase a mobility kit and, as a backup, call roadside assistance (BMW or AAA). |
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10-14-2019, 08:52 PM | #5 |
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Makes good sense to run an AS tire but really should stick with the stock size. In that size, the Michelin Pilot Sport AS they list is a great all year tire, and the Continental DWS06 is not far behind...
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10-15-2019, 10:03 AM | #6 | |
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With the calculation of 235/50/19 you'd be off by 4.53% which is just bare minimum acceptable difference in speedo.. 28.64mph vs 30mph on the speedo.. it's really okay and you'd have "beefier" rubber. 225/55/19 is really like offroad size really.
Stock is 225/45/19 and they come here with all seasons (as my car). As stated.. the wider the tire, the less theoretical traction in the winter. Still depends on the "look" you're aiming for. Quote:
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10-15-2019, 10:30 AM | #7 | |
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Quote:
https://www.michelinman.com/all-weat...imate-suv.html https://www.nokiantires.com/all-weat...ian-wr-g4-suv/ https://www.goodyear.com/en-US/tires...e-weatherready They appear to be an interesting compromise between all-seasons and winter tires. I'm trying to convince myself that I don't need winter tires. Always trying to save money and time. |
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10-15-2019, 12:45 PM | #8 | |
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Quote:
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10-15-2019, 06:10 PM | #9 | |
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FYI, I've had the Nokian G3 (prev gen G4) on our Volvo SUV and they were pretty awful in the snow. Very disappointed with those. Maybe G4 is better, but likely only somewhat. Again, purely MHO. |
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10-15-2019, 08:30 PM | #10 |
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10-16-2019, 12:47 PM | #11 |
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10-16-2019, 08:33 PM | #12 |
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I think the stock 19inch wheels have an 8 inch width.
Would a 255 tyre fit safely on that width? I'd have though a 235 or 245 would be better. cheers
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10-17-2019, 08:52 AM | #13 |
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Wheel should have a width of 8.5 inches. I have thought of both 235, and 245 widths - neither is as close to o.e. diameter as the 255/40 option. I'm also thinking about staying with the 225 width in summer tires...I've yet to run out of grip on the all-seasons, and summer tires would improve grip from the all-seasons considerably.
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10-17-2019, 09:10 AM | #14 | |
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10-17-2019, 10:07 AM | #15 |
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Change in thought...
I am now considering using 18" RFTs in the winter, and 19" non-RFTs in summer. Waiting for roadside assistance in the freezing cold does not sound appealing. knock on wood. |
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10-17-2019, 10:12 AM | #16 | |
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Be sure the 18's you choose fit the M35i. The M brakes require more clearance than the 28i's. See the other thread here recently for one idea. |
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10-20-2019, 07:37 PM | #17 |
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I would go for 235/45-19s. The difference in diameter is very small, will give you a bit extra rim protection, and will fit the wheel just fine.
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10-21-2019, 08:36 AM | #18 |
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I drove a minivan with pilot sport 3 as tires on Michelin’s skid pad. Unreal grip.
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