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      03-29-2021, 03:31 PM   #1
icycoldd
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Best summer tire setup to replace factory run flats 430i

Hello,

My front left tire went bad and is pulling left awfully, because the rest are also worn out I am looking to replace all four. Thought it was an alignment issue but the tire is apparently at fault.

For a summer setup (Miami weather), what's recommended to replace the stock staggered run flats on a 430i? I have the M 19" wheels. From what I remember, non run flats tended to run cheaper, quieter, and softer ride overall.

Thank you.
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      03-29-2021, 03:38 PM   #2
thejeremyman9
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https://f30.bimmerpost.com/forums/sh...php?p=25578475
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      03-29-2021, 05:36 PM   #3
icycoldd
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Thank you for pointing me to that. Seeing as the maximums are 245 up front and 255 in the rear, I might increase to 235 in the front to alleviate some of that fender gap. For simply city driving and highway miles, are the Michellin A/S/3s the most value? I'm guessing I don't need higher performing ones for my use.
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      03-30-2021, 02:19 PM   #4
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Quote:
Originally Posted by icycoldd View Post
Thank you for pointing me to that. Seeing as the maximums are 245 up front and 255 in the rear, I might increase to 235 in the front to alleviate some of that fender gap. For simply city driving and highway miles, are the Michellin A/S/3s the most value? I'm guessing I don't need higher performing ones for my use.
You mean 235/40 instead of 245/35 in front? Going 225/40 to 235/40 should be fine, but perhaps someone else can confirm.

I have AS 3+ on a 2016 Mazda 6. Obviously dont drive it as hard as the 335i but its a great all around AS tire with very good wet and dry performance for its category. Note however, this tire is now superseded by a newer Michelin to my knowledge. If the price is almost the same as the PS4S, however, i would definitely go PS4S for your use case/weather.
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      03-30-2021, 02:57 PM   #5
alohasurftoad
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Quote:
Originally Posted by thejeremyman9 View Post
You mean 235/40 instead of 245/35 in front? Going 225/40 to 235/40 should be fine, but perhaps someone else can confirm.
+1, i agree this is fine. however with 235/40/19(26.4") & 255/35/40(26") the front sidewall(3.7") will be larger than the rear(3.5") due to reverse rake diameter stagger. generally it may not noticeable unless pointed out but exists nevertheless.
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      03-30-2021, 09:48 PM   #6
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Quote:
Originally Posted by icycoldd View Post
Hello,

My front left tire went bad and is pulling left awfully, because the rest are also worn out I am looking to replace all four. Thought it was an alignment issue but the tire is apparently at fault.

For a summer setup (Miami weather), what's recommended to replace the stock staggered run flats on a 430i? I have the M 19" wheels. From what I remember, non run flats tended to run cheaper, quieter, and softer ride overall.

Thank you.
For Miami weather I'd definitely get Michelin Pilot Sport 4S tires. They are the best summer tires- phenomenal grip and are amazing in rain. Perfect for Miami downpours.
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