2010 2011 BMW 5 Series Forum F10
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
 

2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Wheels / Tires / Suspension / Brakes Tire Size Question
Post Reply
 
Thread Tools Search this Thread
      02-20-2014, 03:08 PM   #1
Riff
New Member
0
Rep
7
Posts

Drives: 2011 550i M Sport
Join Date: Feb 2014
Location: Dallas

iTrader: (0)

Tire Size Question

Newbie to the forum and have a question. I purchased and installed the M5 rep wheels for my 2011 550i M Sport......20x9 in the front and 20x10.5 rear. For tires, I went with 255/35/20 in front and 285/30/20 in rear. I went with this setup after looking at post on the forum. I have 2 questions that maybe i should have asked earlier before getting the wheels...1) Why different sizes in the front and rear....meaning 35's on front 30's on rear. 2) can i run 30's on the front too. Don't know if its just me but i can look and tell that the fronts are bigger than the rears...thoughts?? Just asking...first wheel purchase as well
Appreciate 0
      02-20-2014, 04:13 PM   #2
0_steve
Second Lieutenant
159
Rep
251
Posts

Drives: 24 X5 M60i/20 Z4
Join Date: Apr 2011
Location: Charlotte/Orlando

iTrader: (0)

Where did you get the wheels? Ebay? I am going to be ordering the same when my car arrives.

Not sure on the wheels but my guess is it has to maintain the same circumference as the 19" wheels that were original on the car.
Appreciate 0
      02-20-2014, 06:42 PM   #3
remmib
General
remmib's Avatar
Norway
1566
Rep
29,202
Posts

Drives: 2013 F10 520d M-Sport
Join Date: Feb 2006
Location: Norway

iTrader: (0)

The 35 and 30 are the tire profile. The number is the tire sidewall height in per cent of the width.
Since the rears are wider, the percentage of the width needs to be smaller to get the same tire wall height.
But 295/30/20 in the rear would match the fronts better.
__________________

F10 520d M-Sport Alpine White | HRE P43SC 20x9+20x11 | Michelin PSS 255/35+295/30 | KW V3 Coilover | M5 Front Sway Bar + M550d Rear Sway Bar | 3DDesign Front Lip | BMW M Performance CF Spoiler | BMW M Performance Diffuser | BMW M Performance Black Grills | BMW M Performance Pedals |
Appreciate 0
      02-21-2014, 09:07 AM   #4
Riff
New Member
0
Rep
7
Posts

Drives: 2011 550i M Sport
Join Date: Feb 2014
Location: Dallas

iTrader: (0)

Quote:
Originally Posted by 0_steve View Post
Where did you get the wheels? Ebay? I am going to be ordering the same when my car arrives.

Not sure on the wheels but my guess is it has to maintain the same circumference as the 19" wheels that were original on the car.
I ran across them here in Dallas at Discount Tire when another 550i owner was getting new wheels for his car I asked him if wanted to sell the wheels and he agreed.
Appreciate 0
      02-21-2014, 09:46 AM   #5
Riff
New Member
0
Rep
7
Posts

Drives: 2011 550i M Sport
Join Date: Feb 2014
Location: Dallas

iTrader: (0)

Quote:
Originally Posted by remmib View Post
The 35 and 30 are the tire profile. The number is the tire sidewall height in per cent of the width.
Since the rears are wider, the percentage of the width needs to be smaller to get the same tire wall height.
But 295/30/20 in the rear would match the fronts better.
Thanks Remmib.....I will check on the 295/30/20...like i said I can definitely see that the 285/30/20's are not the same tire height as the 255/35/20's in the front.
Appreciate 0
      02-21-2014, 01:13 PM   #6
MELLOWYELLOW06
Major
MELLOWYELLOW06's Avatar
329
Rep
1,204
Posts

Drives: 2020 M8 & 2022 X& M50i
Join Date: Nov 2012
Location: SOCAL

iTrader: (0)

I would go 245/35 & 285/30 combo to be level in height
Appreciate 0
      02-22-2014, 08:04 AM   #7
audiogolf
Second Lieutenant
audiogolf's Avatar
40
Rep
213
Posts

Drives: 2023 X7 40i
Join Date: Dec 2013
Location: New Jersey, USA

iTrader: (0)

if you are getting 20x9 fronts, I would suggest 255/30/20 as 245/30/20 will be slightly stretched, and as you have a rear wheel drive it would be not a problem and 255 will protect your rim better from scratches and gashes!! as you will have a some tire lip. I have 245/30/20 on my 20x9 rims, wish I had gone or 255/30/20s, but I drive an x drive , but even in my case 255 would have been fine as the overall height difference is only ~1% front to rear (285/30/20).
Appreciate 0
      02-22-2014, 08:58 AM   #8
gragi
Private First Class
10
Rep
154
Posts

Drives: 2011 535i xDr F10 M Sport
Join Date: Sep 2012
Location: Toronto

iTrader: (0)

Quote:
Originally Posted by Riff View Post
Thanks Remmib.....I will check on the 295/30/20...like i said I can definitely see that the 285/30/20's are not the same tire height as the 255/35/20's in the front.
you're most defiantly not going to see/notice a difference between 285/30/20 and 295/30/20.
__________________
1996 E36 328i Touring
2000 E46 328Ci
2004 E46 M3 Dinan Exhaust
2011 535xDrive F10 AFE CATBACK, AFE SCORCHER, AFE Performance Air Filter, H&R, AR Down Pipe, ER Charge Pipe.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 03:56 PM.




5post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST