Rear 255/35 or 255/40

dh58 · 10-14-2015, 04:13 AM

I've ran 255/35 but I was wondering would 255/40 fit? I don't understand too much about the 35/40 number but the fronts are 40.

Any help is appreciated!

Dackelone · 10-14-2015, 06:31 AM

You want to keep the SAME diameter tires as stock.(or as close to it!).

I went with this 225/255 combo... and I am very happy with them.

225/40ZR18 94Y
255/35ZR18 92Y

My new Michelin PS3’s 225’s & 255’s…
http://www.1addicts.com/forums/showt...44#post9280344

John_01 · 10-14-2015, 07:48 AM

The tire profile number is the height of the tread as a % of the tire width.

255/40/18 will be too tall. It should be 255/35/18 to stay close to the stock diameter.

MightyMouseTech · 10-14-2015, 08:29 AM

Quote:

Originally Posted by John_01

The tire profile number is the height of the tread as a % of the tire width.

255/40/18 will be too tall. It should be 255/35/18 to stay close to the stock diameter.

This. Even the 255/35 is taller than stock already. Don't go 40 series.

cmark8 · 10-14-2015, 09:16 AM

Quote:

Originally Posted by Dackelone

You want to keep the SAME diameter tires as stock.(or as close to it!).

I went with this 225/255 combo... and I am very happy with them.

225/35ZR18 94Y
255/40ZR18 92Y

My new Michelin PS3’s 225’s & 255’s…
http://www.1addicts.com/forums/showt...44#post9280344

I think you inverted the numbers... According to your pictures it should be

225/40ZR18 front
255/35ZR18 rear

Dackelone · 10-14-2015, 09:34 AM

Quote:

Originally Posted by cmark8

I think you inverted the numbers... According to your pictures it should be

225/40ZR18 front
255/35ZR18 rear

Yes, I did do that! Thanks for correcting me!

The correct tire sizes should read...

225/40ZR18 94Y
255/35ZR18 92Y

Dackel

dh58 · 10-14-2015, 05:05 PM

Thanks guys! Exactly what I was looking for.

I had the 255/35 before but wanted to ask since 255/40 was available and not the 255/35

TheFox · 10-20-2015, 10:45 AM

Quote:

Originally Posted by Dackelone

Yes, I did do that! Thanks for correcting me!

The correct tire sizes should read...

225/40ZR18 94Y
255/35ZR18 92Y

Dackel

Do 255/35/18 fit on the stock rear 18" wheels? Do they look odd?

Sorry I'm not a huge suspension/tire guy. I need new rear tires and going a bit wider would be nice.

Dackelone · 10-20-2015, 11:55 AM

Quote:

Originally Posted by TheFox

Do 255/35/18 fit on the stock rear 18" wheels? Do they look odd?

Sorry I'm not a huge suspension/tire guy. I need new rear tires and going a bit wider would be nice.

They look fine. They are wider than 245's though.

Here are my 255's on stock wheels(8.5j rears)...

My new Michelin PS3’s 225’s & 255’s…
http://www.1addicts.com/forums/showt...44#post9280344[/B]

Technically a 255 tire needs a 9 inch wide wheel... but they fit fine on the stock 8.5j OE wheels. Heck ,even BMW now puts 225/255 wheels on the same stock wheels on some of the F3x cars. It really is fine.

Dackel

Esteban · 10-20-2015, 01:14 PM

I have the same size tires and wheels as Dack and they fit fine. A lot of people here have those sizes and are perfectly happy with them.

10-14-2015, 04:13 AM	#1
dh58 Major 108 Rep 1,075 Posts Drives: 135i Join Date: Aug 2010 Location: Bunker in Sydney iTrader: (1)	Rear 255/35 or 255/40 I've ran 255/35 but I was wondering would 255/40 fit? I don't understand too much about the 35/40 number but the fronts are 40. Any help is appreciated!
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10-14-2015, 06:31 AM	#2
Dackelone European Editor 10528 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	You want to keep the SAME diameter tires as stock.(or as close to it!). I went with this 225/255 combo... and I am very happy with them. 225/40ZR18 94Y 255/35ZR18 92Y My new Michelin PS3’s 225’s & 255’s… http://www.1addicts.com/forums/showt...44#post9280344 __________________ Dackel's European Delivery Museum Guide
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10-14-2015, 07:48 AM	#3
John_01 Colonel 232 Rep 2,643 Posts Drives: E90 325i, E82 135i Join Date: Mar 2009 Location: Sydney, Australia iTrader: (0)	The tire profile number is the height of the tread as a % of the tire width. 255/40/18 will be too tall. It should be 255/35/18 to stay close to the stock diameter.
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10-14-2015, 05:05 PM	#7
dh58 Major 108 Rep 1,075 Posts Drives: 135i Join Date: Aug 2010 Location: Bunker in Sydney iTrader: (1)	Thanks guys! Exactly what I was looking for. I had the 255/35 before but wanted to ask since 255/40 was available and not the 255/35
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10-20-2015, 01:14 PM	#10
Esteban Major General 43338 Rep 7,224 Posts Drives: a slow car fast Join Date: Jun 2014 Location: SoCal iTrader: (0)	I have the same size tires and wheels as Dack and they fit fine. A lot of people here have those sizes and are perfectly happy with them. __________________
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