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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Wheels and Tires -- Sponsored by The Tire Rack > how to calculate rolling circumference?
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      08-23-2024, 01:37 PM   #45
GamaM440
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Quote:
Originally Posted by visionaut View Post
FWIW, those are too tall. They’re 18.5mm larger diameter than stock (2.72% Speedo error). Should really be running 30 aspect ratio on 20s…
Less chance to get ticket .... lol...120 will be 116.6
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      08-23-2024, 02:27 PM   #46
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I’d be more worried of the 3/4” taller tires rubbing the front of the front fender liner on tight turns and/or under compression, especially if lowered, than getting tickets.. Larger diameter is slower too, so it may take a spec more time to get to your 116.6.

If they work, great. Just trying to let you know they’re oversized before you buy.
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      08-24-2024, 02:32 AM   #47
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Quote:
Originally Posted by visionaut View Post
I’d be more worried of the 3/4” taller tires rubbing the front of the front fender liner on tight turns and/or under compression, especially if lowered, than getting tickets.. Larger diameter is slower too, so it may take a spec more time to get to your 116.6.

If they work, great. Just trying to let you know they’re oversized before you buy.
Height gain will not be 3/4" ( which is 20mm ) height gain will be 10mm rear 7mm front , yes maybe slight rubbing on full lock when parking in tight spots, I did chk the gap and rite now clearance is more than 20mm to fenders hopefully be fine , will update here

Regarding the speedometer meter BMW speedometers usually read higher than actual(gps) from the factory. with 245/35/20, speedometer should be close to actual speed(gps).
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      09-05-2024, 06:44 PM   #48
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Really thankful to @alohasurftoad and all the other members who give me confidence to install 245/35/20 all around on 2018 F32 MPPSK which has OEM staggered size of 255/30/20 rear and 225/35/20 front
no rubbing in front at any format even full cut / turn in reverse is also not rubbing , maybe because of 8J front and 8,5J rear rims ( not sure ) but worked for me
vehicle is wayyyyyyyyy wayyyyyy comfortable with Conti SC DWS 06 and thanks GOD i remove run flat Pirellis
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Last edited by GamaM440; 09-06-2024 at 05:26 PM..
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      09-06-2024, 12:06 AM   #49
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dude...plz resize and re-orient the photos, so we do no have to turn our head sideways or lock the auto-rotate on the phone's screen. lolz

it looks nice from what i can tell.
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      09-06-2024, 12:20 PM   #50
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haha thanks. tried everything but not working while editing also rotate before loading but its posting same way
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      09-06-2024, 12:56 PM   #51
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haha thanks. tried everything but not working while editing also rotate before loading but its posting same way
eh? i jus did this for you, right now...lol
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      09-06-2024, 04:34 PM   #52
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eh? i jus did this for you, right now...lol
Haha thanks a lot you are the man
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      09-06-2024, 05:27 PM   #53
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eh? i jus did this for you, right now...lol
Here you go Boss and really appreciated your help , I would never ever able to pull the pin on these tires without your help 😀
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