20" square setup on 340 X-drive?

Seattle135is · 09-09-2019, 10:07 PM

I have the opportunity go with this setup on my 340 XD - 20" x 9" et33 - with 245/35 on all 4 corners.
Any downside to going with this setup on my vehicle?

alohasurftoad · 09-10-2019, 12:23 PM

although your butt dyno may not sensitive enough to feel it, 245/35/20 will worsen your acceleration and braking because it's taller(pavement gearing) and heavier. although, it fills the hideous x-drive gap nicely, it's also raising the total height of the vehicle 0.4". if the wheel offset is too low, there is a possibility of front tires outer shoulder rubbing fenderwell liner while turning.

personally, i prefer not deviating more than 0.5" diameter greater(or lower) than the 26" oem diameter. 26.8" is approaching F34 oem diameter of 27".

here is a thread with square 245/35/20... https://f30.bimmerpost.com/forums/sh...d.php?t=849595

09-09-2019, 10:07 PM	#1
Seattle135is Lieutenant 198 Rep 501 Posts Drives: 2015 M4 Join Date: Mar 2007 Location: Seattle/San Antonio/Chicago iTrader: (0) Garage List 2007 335i [0.00] 2005 SL 55 AMg [0.00] 2007 Porsche 997 Turbo [0.00]	20" square setup on 340 X-drive? I have the opportunity go with this setup on my 340 XD - 20" x 9" et33 - with 245/35 on all 4 corners. Any downside to going with this setup on my vehicle? __________________ 2018 R8 V10+ - Ara Blue/Gray 2022 MS Plaid - Red/White (Daily) 2021 Alfa Stelvio - Red/Black 2013 135is - LeMans Blue/Gray 2003 M5 (56k miles) - CB/Black
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09-10-2019, 12:23 PM	#2
alohasurftoad Brigadier General 3078 Rep 4,327 Posts Drives: 440i gran coupe w/mppsk Join Date: Apr 2015 Location: hawaii iTrader: (0)	although your butt dyno may not sensitive enough to feel it, 245/35/20 will worsen your acceleration and braking because it's taller(pavement gearing) and heavier. although, it fills the hideous x-drive gap nicely, it's also raising the total height of the vehicle 0.4". if the wheel offset is too low, there is a possibility of front tires outer shoulder rubbing fenderwell liner while turning. personally, i prefer not deviating more than 0.5" diameter greater(or lower) than the 26" oem diameter. 26.8" is approaching F34 oem diameter of 27". here is a thread with square 245/35/20... https://f30.bimmerpost.com/forums/sh...d.php?t=849595
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