01-20-2017, 12:44 PM | #23 |
Private
21
Rep 83
Posts |
I haven't changed tires yet, so I don't have any personal experience with different tire widths, but I'm pretty sure I've read that people are running 245's up front and 285's in the rear on the stock rims without problems.
|
Appreciate
0
|
01-23-2017, 09:54 AM | #25 | |
Private
21
Rep 83
Posts |
Quote:
You can do additional comparisons at, https://tiresize.com/comparison/ |
|
Appreciate
0
|
01-23-2017, 05:57 PM | #27 |
Major
708
Rep 1,405
Posts |
|
Appreciate
0
|
01-23-2017, 06:01 PM | #28 | |
Colonel
831
Rep 2,352
Posts
Drives: 16' BMW i8
Join Date: Feb 2012
Location: The REAL Jersey Shore
iTrader: (1)
Garage List 2001 BMW M3 E46 CON ... [9.50]
2016 BMW i8 [10.00] 2003 JEEP GRAND CHE ... [0.00] 2000 540i SPORT E39 [10.00] 2007 TOYOTA TACOMA ... [0.00] |
Quote:
|
|
Appreciate
0
|
01-24-2017, 09:33 AM | #31 |
Private First Class
41
Rep 115
Posts |
|
Appreciate
0
|
01-24-2017, 11:50 AM | #32 | |
Major
1830
Rep 1,315
Posts |
Quote:
My guess is that it would work, but I am uncertain Shawn |
|
Appreciate
0
|
01-24-2017, 01:08 PM | #33 |
Colonel
831
Rep 2,352
Posts
Drives: 16' BMW i8
Join Date: Feb 2012
Location: The REAL Jersey Shore
iTrader: (1)
Garage List 2001 BMW M3 E46 CON ... [9.50]
2016 BMW i8 [10.00] 2003 JEEP GRAND CHE ... [0.00] 2000 540i SPORT E39 [10.00] 2007 TOYOTA TACOMA ... [0.00] |
Not sure if anybody knows the answer to this but if you look at the diagrams above and you see the diameter for Size 1 and Size 2 and then % diameter difference.
If going to non-OEM tires like we all are discussing, do front and rear tire both have to be -% or -% (or +% and +%) or can front/rear can be -% and +%? The reason why I ask is because the % diameter difference plays a huge role in speedometer accuracy. If the front has a -% and the rear has a +% (or vice versa), does that cause an issue? EDIT: For Example. If you go to a front 235/40/20, it is a -0.7% diameter difference than front OEM. So the speedometer will read slower than OEM. But if you put rear 255/40/20, it is a +1.1% diameter difference which means the speedometer will be faster than OEM. Last edited by Ghetto2315; 01-24-2017 at 01:26 PM.. |
Appreciate
0
|
01-25-2017, 03:30 AM | #34 | |
Private First Class
23
Rep 137
Posts |
Quote:
So the rear tyre is the important one. And going slightly larger is no bad thing as it will fix the flight speedo over read. |
|
Appreciate
0
|
01-25-2017, 07:10 AM | #35 |
Lieutenant
102
Rep 407
Posts |
I wouldn't get too hung up on it - I read somewhere that a couple of % shouldn't be an issue (not sure if there was proper maths behind it though).
Your tyre/tire diameter fluctuates anyway presumably with pressure changes, thermal changes and tread wear over time. What's the tread depth on new tyres/tires? Is it about 10mm and down to 3mm when worn, so you've got a 7mm variance over the life of the rubber anyway.
__________________
2014 i8
2002 x5 4.6is |
Appreciate
0
|
01-25-2017, 07:14 AM | #36 | |
Private
21
Rep 83
Posts |
Quote:
And, tires by different manufacturers with the same specifications will have slightly different widths and diameters. Don't sweat the small differences. |
|
Appreciate
0
|
02-05-2017, 04:19 PM | #37 |
Private
24
Rep 83
Posts |
Does anyone by any chance know the offsets for the front and rear OEM wheels? (W style, not the turbines).
I was talking with a wheel shop and for their wheels they recommended the following: Front: 245/40/20 with a 34mm ET offset (20x9) Rear 275/35/20 with a 45mm ET offset (20x10) Will these sit flush or poke out at all? |
Appreciate
0
|
02-05-2017, 04:46 PM | #38 | |
Agent Smith
270
Rep 3,344
Posts
Drives: 2016 i8
Join Date: Jan 2011
Location: The Matrix
|
Quote:
__________________
The i8 needs a V8 amirite?
|
|
Appreciate
0
|
02-06-2017, 09:36 AM | #39 | |
Major
708
Rep 1,405
Posts |
Quote:
The stocks are 20x7.5 Et +40 & 20x8.5 Et +50 |
|
Appreciate
0
|
02-13-2017, 01:21 AM | #40 |
Private
24
Rep 83
Posts |
What offset do you think should have the rears sitting flush? Closer to ET50 with a 275/35/20 (20x10") setup? I'm about to pull the trigger on the wheels tomorrow and want to make sure that the wheels engineers have the right measurements for a flush seated wheel.
|
Appreciate
0
|
02-13-2017, 10:17 AM | #41 | |
Major
708
Rep 1,405
Posts |
Quote:
|
|
Appreciate
0
|
02-13-2017, 06:49 PM | #42 | |
Private
24
Rep 83
Posts |
Quote:
I'm planning on doing a wrap and putting the wheels on, will definitely post pictures. Build time is estimated at 7-10 weeks |
|
Appreciate
0
|
02-14-2017, 03:52 PM | #44 |
Major
708
Rep 1,405
Posts |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|