Help with Tyre sizes please!

Jules-B · 04-10-2010, 05:44 AM

Hi all
Got a new set of rims.

8.5j. 19" and 9.5j 19". they are going on my 335i.

I was talking to somone yesterday that told me i cant go for a 265/35/19 on the rear because it will mess up the rolling radius, and break bearings etc.

I did want to go for something with a bit more meat on it (currently have 20's with 25 profile!!) because the roads here are awful.

Advise please!

MassBimmer · 04-10-2010, 10:06 AM

265 in the rear by itself will not mess up the rolling radius, there are tons of guys on here that are running that size in the rear. The important thing is making sure that the relative rolling radius between the front and back remains equal. For example, you could easily run 235/35/19 F and 265/30/19 R without any issues.

Jules-B · 04-10-2010, 01:23 PM

Thats what i was told.
Can i run 265/35/19 on the rear?? or will that be no good?

02themax · 04-10-2010, 11:03 PM

No I would do 275/30's reaer 235/35's front

shoes · 04-10-2010, 11:21 PM

You generally shouldn't change the sidewall aspect ratio.

For the rear:
No: 265/35/19
Yes: 265/30/19

Use a 235/35/19 in the front.

04-10-2010, 05:44 AM	#1
Jules-B Private First Class 16 Rep 199 Posts Drives: Autovogue 335i Join Date: Feb 2010 Location: Herts iTrader: (0)	Help with Tyre sizes please! Hi all Got a new set of rims. 8.5j. 19" and 9.5j 19". they are going on my 335i. I was talking to somone yesterday that told me i cant go for a 265/35/19 on the rear because it will mess up the rolling radius, and break bearings etc. I did want to go for something with a bit more meat on it (currently have 20's with 25 profile!!) because the roads here are awful. Advise please!
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04-10-2010, 10:06 AM	#2
MassBimmer Major General 306 Rep 7,433 Posts Drives: 2023 i4 M50 Join Date: May 2009 Location: MA iTrader: (6) Garage List 2009 BMW [9.24]	265 in the rear by itself will not mess up the rolling radius, there are tons of guys on here that are running that size in the rear. The important thing is making sure that the relative rolling radius between the front and back remains equal. For example, you could easily run 235/35/19 F and 265/30/19 R without any issues.
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04-10-2010, 01:23 PM	#3
Jules-B Private First Class 16 Rep 199 Posts Drives: Autovogue 335i Join Date: Feb 2010 Location: Herts iTrader: (0)	Thats what i was told. Can i run 265/35/19 on the rear?? or will that be no good?
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04-10-2010, 11:03 PM	#4
02themax Captain 28 Rep 946 Posts Drives: E90 335i Join Date: Apr 2008 Location: Calgary, AB iTrader: (6)	No I would do 275/30's reaer 235/35's front __________________ E90 335i Sport Package - Logic 7 Sound w/ipod - Bluetooth - Comfort Access - PDC - 19" M3 Reps 275/30 235/35 - Blacklines - 10mil spacers rear, 5mil spacers front - BMW Alarm
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04-10-2010, 11:21 PM	#5
shoes Captain 25 Rep 635 Posts Drives: 07 BSM E92 335i Join Date: Sep 2009 Location: Huntington Beach, CA iTrader: (1)	You generally shouldn't change the sidewall aspect ratio. For the rear: No: 265/35/19 Yes: 265/30/19 Use a 235/35/19 in the front. __________________
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