Larger wheels at the back?

philippelyp · 09-16-2011, 05:43 PM

Hi Guys,

I currently have 17' wheels with 225-45 tires. I had a talk with my mechanic yesterday as I'm thinking about refinishing the wheels and changing the tires (the Potenza will not have lasted 2 years) and he suggested to change the back wheels to 18' with 255-35 to improve handling. What do you think? Did anyone did that?

Also, what about The Michelin Pilot Sport PS2 ZP. Any experience with thoses?

Thanks,
Philippe

dubsesd · 09-16-2011, 06:22 PM

You need to change all wheels when upgrading. I would recommend an oem set of BMW wheels that fit non-M fitment paired with 225/40/18 front and 245/35/18 or 245/40/18 in the back

l4zy · 10-10-2011, 01:18 AM

its been done before...i remember some cars in the past have come that way. just gotta make sure you get the right tire size to maintain overall diameter.

here are some examples. you get quite a few hits if you search google

3002 tii · 10-11-2011, 10:17 AM

Quote:

Originally Posted by dubsesd

You need to change all wheels when upgrading. I would recommend an oem set of BMW wheels that fit non-M fitment paired with 225/40/18 front and 245/35/18 or 245/40/18 in the back

OEM 18” non-m is 225/40 and 255/35 in the back (assuming you have staggered widths).

OP - Keep in mind 18s will most likely be heavier than the 17’s you have now so the car my feel like it’s bogging off the line. For improved handling, I would say stick to your 17’s but get grippier tires. 17’s will also be cheaper than 18’s. PS2’s are great but expensive, I like the Direzza Star Specs.

ANILE8 · 10-12-2011, 07:33 AM

Quote:

Originally Posted by Dubbedown

OEM 18” non-m is 225/40 and 255/35 in the back (assuming you have staggered widths).

Pretty sure those sizes are the official M fitments not as you said Non M fitments.

3002 tii · 10-12-2011, 12:46 PM

Quote:

Originally Posted by ANILE8

Pretty sure those sizes are the official M fitments not as you said Non M fitments.

No they're not. The M has thicker sidewalls.

ANILE8 · 10-12-2011, 01:17 PM

Apologies to you, my mistake.

09-16-2011, 05:43 PM	#1
philippelyp Private 8 Rep 91 Posts Drives: SMG Supercharged Join Date: Aug 2011 Location: Los Angeles iTrader: (0)	Larger wheels at the back? Hi Guys, I currently have 17' wheels with 225-45 tires. I had a talk with my mechanic yesterday as I'm thinking about refinishing the wheels and changing the tires (the Potenza will not have lasted 2 years) and he suggested to change the back wheels to 18' with 255-35 to improve handling. What do you think? Did anyone did that? Also, what about The Michelin Pilot Sport PS2 ZP. Any experience with thoses? Thanks, Philippe
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09-16-2011, 06:22 PM	#2
dubsesd #dubspec 6337 Rep 5,201 Posts Drives: G05 X5/ 2016 F80 M3 INDVL Join Date: Jul 2011 Location: Ottawa iTrader: (2)	You need to change all wheels when upgrading. I would recommend an oem set of BMW wheels that fit non-M fitment paired with 225/40/18 front and 245/35/18 or 245/40/18 in the back
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10-10-2011, 01:18 AM	#3
l4zy Captain 42 Rep 881 Posts Drives: 95 M3, 15 i3, 17 M3 Frz Wht Join Date: Jan 2007 Location: Chino, CA iTrader: (11) Garage List 2017 BMW M3 [0.00] 2015 BMW i3 REX [0.00] 1995 BMW M3 [10.00] 2013 BMW X3 xDrive35i [7.00]	its been done before...i remember some cars in the past have come that way. just gotta make sure you get the right tire size to maintain overall diameter. here are some examples. you get quite a few hits if you search google __________________ BMW CCA ///Member #440690
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10-12-2011, 01:17 PM	#7
ANILE8 Captain 180 Rep 700 Posts Drives: Z4 M Coupé - Carbon Black Join Date: Mar 2008 Location: The Dark Web iTrader: (0)	Apologies to you, my mistake. __________________ Nitron NTR R3 \| StopTech Trophy Sport STR-60 380x32mm / StopTech Trophy Sport STR-40 355x32mm \| Bridgestone RE-71RS \| ADV.1 \| CDV Delete \| TMS Rear Camber Arms \| RE Diablo's \| 4.10 Gears \| Euro Headers \| RTD REVO1 Short Shifter
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