12-10-2018, 01:49 PM | #1 |
Second Lieutenant
280
Rep 230
Posts |
Am I okay running 245/40/20 and 275/35/20
The G30 5 series with 20" OEM wheels comes equipped with 245/35/20 fronts and 275/30/20 rears.
My car came with the 19" wheels and I have my eyes on a set of aftermarket 20s. I'd really like the added protection of a thicker tire. I also think it looks better. I want to know if I will run into any problems if I ran a 245/40 and 275/35 combo. I've read conflicting information on this forum and can't seem to get a solid answer. Anyone out there running this tire size? Anyone with some real answers? |
12-11-2018, 09:38 AM | #3 |
Major General
1863
Rep 5,140
Posts |
|
Appreciate
0
|
12-11-2018, 06:26 PM | #4 | |
Second Lieutenant
280
Rep 230
Posts |
Quote:
Thank you for your response. Actually, when I searched the forum your post was one of the first I saw. Are you still running this tire size? I'm wondering if anyone has experiences any problems with running it long term. What are the disadvantages of running the bigger tires, if any...? Any advice is appreciated. My local tire guy tells me they will fit but isn't sure if there will be problems in the long run. |
|
Appreciate
1
mierzwin15.50 |
12-12-2018, 08:31 PM | #5 | |
Private
12
Rep 57
Posts |
Quote:
Its nice to use so you can calculate the correct ratio front and back. the last thing that you would want to have is the front wheels turning at a different rotation and the back and hurt the driveline of the car. |
|
Appreciate
0
|
12-13-2018, 10:38 AM | #6 | |
Second Lieutenant
280
Rep 230
Posts |
Quote:
@.BMW. has been great in helping me with this issue. He's very knowledgable with this stuff and I'm going to take his word on this. It's going to be a close call The wheels I ordered are: Front 20x8.5 +25 offset Rear 20x10 +36 offset Last edited by fan51; 12-13-2018 at 10:52 AM.. |
|
Appreciate
0
|
12-13-2018, 11:32 AM | #7 | ||
Private
12
Rep 57
Posts |
Quote:
|
||
Appreciate
0
|
12-13-2018, 12:27 PM | #8 | |
Second Lieutenant
280
Rep 230
Posts |
Quote:
Thank you for your help! Much appreciated. I'm going to order the tires and keep my fingers crossed! |
|
Appreciate
0
|
12-24-2018, 10:41 PM | #9 | ||
Enlisted Member
3
Rep 35
Posts |
Quote:
At first I was looking out for any tire scraping when I turned or when I hit pothole, didn't hear or feel anything. I purposely was running over potholes to test it. Not sure why Bmw doesn't offer this size as optional, the oem side wall sizes really suck. |
||
Appreciate
0
|
12-27-2018, 02:09 AM | #10 |
Registered
5
Rep 2
Posts |
fitting this setup 245*35*20 / 275*30*20
|
Appreciate
1
Brake_Late1936.50 |
12-27-2018, 02:06 PM | #11 | |||
Second Lieutenant
280
Rep 230
Posts |
Quote:
|
|||
Appreciate
0
|
12-27-2018, 02:49 PM | #12 |
Captain
472
Rep 888
Posts
Drives: 2019 M550i
Join Date: Aug 2018
Location: Tampa Bay
|
Odometer will roll slightly faster as well as your speed
|
Appreciate
3
|
12-27-2018, 03:04 PM | #13 | ||||
Enlisted Member
3
Rep 35
Posts |
Quote:
|
||||
Appreciate
0
|
12-29-2018, 06:43 PM | #14 | ||||
Enlisted Member
3
Rep 35
Posts |
Quote:
|
||||
Appreciate
0
|
01-18-2019, 06:36 AM | #15 | |||
Major General
7859
Rep 5,796
Posts
Drives: 2024 BMW XM Label
Join Date: Jan 2019
Location: Houston, TX
|
Quote:
|
|||
Appreciate
0
|
01-18-2019, 12:51 PM | #16 |
Major General
1863
Rep 5,140
Posts |
|
Appreciate
2
VirtualGuitars7858.50 ds777771.50 |
01-18-2019, 01:25 PM | #17 |
Private
7
Rep 77
Posts |
|
Appreciate
0
|
01-18-2019, 01:35 PM | #18 |
Major
376
Rep 1,223
Posts |
__________________
2018 M550iX-Dinan Stage 1 | 2011 E93 M3 Convertible | 2002 E46 M3 Convertible | 2002 E53 X5 3.0 | 2000 E39 540i | 1998 E36 M3 | 1988 E28 M5 | 1987 E28 528i
|
Appreciate
0
|
01-18-2019, 04:24 PM | #19 |
Major General
7859
Rep 5,796
Posts
Drives: 2024 BMW XM Label
Join Date: Jan 2019
Location: Houston, TX
|
You are correct. My speedometer always seems to report 1 or 2 mph faster than it really is. I'm comparing it to the GPS speed on my radar detector.
|
Appreciate
0
|
03-07-2019, 04:32 PM | #20 | ||||||||||
Private
9
Rep 61
Posts |
Quote:
Quote:
Are the wheels bmw oem or aftermarket? Thx
__________________
Nuno
|
||||||||||
Appreciate
0
|
03-07-2019, 10:23 PM | #21 | |||||||||||
Enlisted Member
3
Rep 35
Posts |
Quote:
|
|||||||||||
Appreciate
0
|
03-08-2019, 12:15 PM | #22 |
Private First Class
10
Rep 156
Posts |
Discussed this (as id prefer the look of a taller tyre on the 20's) with a former bmw master tech who advised against it ...he said the cars are mapped to a certain circumference tyre and this could cause overgearing and drivetrain wear.
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|