upgrade rear to 255/40

rexwrx · 02-24-2008, 01:42 AM

Hi,

i've got factory Type 158 (17x8 ET34 225/45 R17) with rf tyres - all factory.

would like to get a wider set of rear tyres pref 255/40 spec.

is this do-able on the stock rims? has anyone done it? what are the prices if this is feasible?

ride and handling? any differences?

was also thinking of changing the springs to lower the car. any suggestions?

thanks.

Park2670 · 02-24-2008, 02:31 AM

The wheels are far too narrow for a tire that wide. I wouldnt do it. If you want wider tires, get wider wheels.

jasonn · 02-24-2008, 08:42 AM

Exactly, if you decide on doing so and want to stay OEM, check the style 162 wheels or BMW Performance wheel. If you're feeling bold and want to go after-market, the options are endless.

bimdaddy · 02-24-2008, 10:25 AM

8" wide rims will give your 225 a good stretch. You can do 235 and that's max. I would not go any wider than 235 on 8" rims.

Nikolas · 02-24-2008, 12:23 PM

You can do it. You just need to choose a stiff side walled tire. I ran the same size on my STI track set up. Stock 17X8 with 255/40/17 azenis RT-615

However, as others have said a wider wheel would be better.

rexwrx · 02-25-2008, 04:25 AM

Ok thanks - so either a 235 which is the recommended max or swap to wider wheel (8.5?)

Gary@TireRack · 02-25-2008, 09:20 AM

Quote:

Originally Posted by rexwrx

Ok thanks - so either a 235 which is the recommended max or swap to wider wheel (8.5?)

Correct.

FastBimmer335 · 02-25-2008, 09:59 PM

Quote:

Originally Posted by Park2670

The wheels are far too narrow for a tire that wide. I wouldnt do it. If you want wider tires, get wider wheels.

+1

02-24-2008, 01:42 AM	#1
rexwrx Enlisted Member 3 Rep 33 Posts Drives: bmw 325i Join Date: Jan 2008 Location: melbourne iTrader: (0)	upgrade rear to 255/40 - for e90 sedan Hi, i've got factory Type 158 (17x8 ET34 225/45 R17) with rf tyres - all factory. would like to get a wider set of rear tyres pref 255/40 spec. is this do-able on the stock rims? has anyone done it? what are the prices if this is feasible? ride and handling? any differences? was also thinking of changing the springs to lower the car. any suggestions? thanks.
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02-24-2008, 02:31 AM	#2
Park2670 General 361 Rep 18,218 Posts Drives: Tesla Model 3 Join Date: Jan 2006 Location: UTAH iTrader: (8)	The wheels are far too narrow for a tire that wide. I wouldnt do it. If you want wider tires, get wider wheels. __________________
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02-24-2008, 08:42 AM	#3
jasonn JDM Slut 143 Rep 4,233 Posts Drives: v Join Date: Feb 2006 Location: FL iTrader: (12) Garage List 2014 PORSCHE CAYMAN [10.00] 2013 BMW X1 [9.00] 2014 BMW X5 xDrive35i [9.00] 2013 PORSCHE 991 [10.00] 2007 BMW 335i [9.08]	Exactly, if you decide on doing so and want to stay OEM, check the style 162 wheels or BMW Performance wheel. If you're feeling bold and want to go after-market, the options are endless.
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02-24-2008, 10:25 AM	#4
bimdaddy Major 37 Rep 1,165 Posts Drives: 911 Carrera & G01 X3 Join Date: Feb 2007 Location: MD iTrader: (10)	8" wide rims will give your 225 a good stretch. You can do 235 and that's max. I would not go any wider than 235 on 8" rims. __________________ 2020 X3 X-Drive 30i; Alpine White/Mocha
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02-24-2008, 12:23 PM	#5
Nikolas Colonel 313 Rep 2,576 Posts Drives: 996 TT Join Date: Jul 2007 Location: Sierra Mountains iTrader: (0)	You can do it. You just need to choose a stiff side walled tire. I ran the same size on my STI track set up. Stock 17X8 with 255/40/17 azenis RT-615 However, as others have said a wider wheel would be better.
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02-25-2008, 04:25 AM	#6
rexwrx Enlisted Member 3 Rep 33 Posts Drives: bmw 325i Join Date: Jan 2008 Location: melbourne iTrader: (0)	Ok thanks - so either a 235 which is the recommended max or swap to wider wheel (8.5?)
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