12-29-2019, 12:17 AM | #89 |
Major General
7252
Rep 7,429
Posts |
Haha good to know!
I probably will go with a hankook rs4 or bridgestone re71R option though since MPS4S and street Michelin tires tend to suck on the track. Probably in time, this m2 build is taking me forever to get started since I still have a few projects to deal with.
__________________
Click on the link below to see a compiled list of every review I have ever written:
https://f87.bimmerpost.com/forums/sh...2#post30368242 |
Appreciate
0
|
12-29-2019, 03:49 PM | #90 |
First Lieutenant
280
Rep 391
Posts
Drives: F87 M2C
Join Date: Aug 2017
Location: Hawaii
|
Took a look at the clearance between tire and fender liner for the stock setup. No joke there isn't a lot of room there. Have to squeeze my finger to get in between. Guess I have to stick with stock wheel fitment to up the tire 255 from 245.
__________________
Past: 2011 Acqua Minerale Blue Hyundai Genesis Coupe 3.8 Past: 2017 Alpine White 440i F32 Current: 2020 Long Beach Blue M2 Competition PC Build: 5950x/6900xt |
Appreciate
0
|
01-05-2020, 12:29 AM | #91 |
Private First Class
13
Rep 195
Posts |
Returned my F80 M3 and curious if the setup I had will fit the M2C. Stock suspension with no plans on lowering, just a daily driver. WillTheyFit puts the front 13.4mm and rear 12.4mm out more
VFF 101's with: 19x9.5 et22 265/35/19 19x10.5 et34 285/35/19 |
Appreciate
0
|
01-07-2020, 06:57 PM | #92 |
Major
1150
Rep 1,409
Posts |
|
Appreciate
0
|
01-07-2020, 10:26 PM | #93 |
Remove Before Flight
6822
Rep 1,611
Posts |
Ok guys--
I've been reading, and reading and READING. And my head? Explodie. Definitive answer please-- BONE STOCK suspension on a S55 2020 M2C. No springs, coil overs, camber plates or anything. No drop. No nuthin' suspension-wise. I'd like to go +1-- i.e. from 245/265 on Michelin Pilot Super Sport to 255/275 on Michelin PS4S's. Will this fit with NO rubbing?. Not even a little? The car is 11 weeks out, and I'm considering swapping the tires as soon as I get my hands on it. Thanks-- I've read "no problem", "sight rubbing" to "sure, stick a 275/305 on it, it's all good"-- I've lost the plot. R. |
Appreciate
0
|
01-08-2020, 05:11 AM | #94 | |
Captain
518
Rep 744
Posts |
Quote:
BTW 255/40/18 and 255/35/19 are equal, see here https://www.wheel-size.com/calc/?whe...cl=50mm&sr=0mm
__________________
AX 1.1 --> AX GTI --> NA Roadster 1.8 --> E39 528i --> Xsara VTS --> Volvo 940 LPT --> Focus RS MK3 --> M2C + NA Miata 1.8
|
|
Appreciate
0
|
01-08-2020, 07:16 AM | #95 | |
New Member
6
Rep 18
Posts |
Quote:
If your running high power 500+ then go 285 rear as traction will be far better, same aspect ratio of 35! I even run winters at 285, I know it’s not optimal for snow but I only really use winters for when temperature drops, they don’t rub at all and my suspension is bone stock, the other advantage of wider tyres is better durability, they last a good while longer, which is my reason for using them. |
|
Appreciate
0
|
01-08-2020, 11:08 AM | #96 | |
Banned
6637
Rep 4,145
Posts
Drives: '18 M2 6MT
Join Date: Sep 2019
Location: Missouri
|
Quote:
The problem is the front 255/30 has a much wider shoulder than the stock 245/35 because it's so much shorter. So stock TW is 8.6 and the 255's is 9.8, so you're adding .6 to each side of the tire. The saving grace is that the OD of the 255 is 25.1, whereas stock OD is 25.8, so you're .35 shorter on top. |
|
Appreciate
0
|
01-08-2020, 11:33 PM | #97 | |
Remove Before Flight
6822
Rep 1,611
Posts |
Quote:
Not sure what TW is? I'm "okay" at tires, but not very good at the "in the weeds" numbers-- I pretty much understand the part about sidewall aspect ration vs. width, but that's close to the end of my knowledge. From what I figured, 255 tires were w/in 1% and about 9mm (?) difference from 245? Could be wrong-- doing it from memory. From what I saw at dealer, full lock gave me about 1 finger of clearance (technical measurement) on the 245 on the front. Since I'm looking to do this to a car on order, I sort of need a definitive "yes/no" since I can't really experiment on my own. TIA-- R. Last edited by flybigjet; 01-08-2020 at 11:38 PM.. |
|
Appreciate
0
|
01-09-2020, 11:58 AM | #98 | |
Banned
6637
Rep 4,145
Posts
Drives: '18 M2 6MT
Join Date: Sep 2019
Location: Missouri
|
Quote:
The reason that there are so many threads like this is because the tire industry has no standardization, so a 245/35/19 Michelin PS4S can be, and fit quite differently from a 245/35/19 Toyo R888. The TW is important because it's where the shoulder, or the edge of the tire is, so it gives you something to look at with regards to where the edges will sit, and knowing the specs of the stock tire you can compare them, and get a good idea if it'll rub or not. Choosing such a short tire and not dropping the car, you should have no issues, but unless someone has done exactly what you mean to to, with the exact same make/model/size of tire, then no one can tell you for certain. |
|
Appreciate
0
|
01-09-2020, 03:16 PM | #99 | |
Brigadier General
2723
Rep 3,337
Posts |
Quote:
Two tires that fall on each side of the extremes of section width (for example) might cause a rub issue with one where the other one clears...always been the case...
__________________
Current Stable:
2024 G20 M340i Melbourne Red/Cognac 2019 F87 M2 Competition 6MT, LBB, slicktop, exec pkg 2007 E91 328i Silver, slushbox, Eibach fr/E93 M3 rear sway bars, ARC-8 |
|
Appreciate
0
|
01-09-2020, 04:11 PM | #100 | |
Banned
6637
Rep 4,145
Posts
Drives: '18 M2 6MT
Join Date: Sep 2019
Location: Missouri
|
Quote:
There is no standardization. |
|
Appreciate
0
|
01-09-2020, 10:49 PM | #101 |
Major General
7252
Rep 7,429
Posts |
For example the exact same size RE71R will tend to be a bit fatter than the more "narrow" fitting RS4 probably due to the RE71R having huge shoulders.
__________________
Click on the link below to see a compiled list of every review I have ever written:
https://f87.bimmerpost.com/forums/sh...2#post30368242 Last edited by F87source; 01-10-2020 at 05:15 PM.. Reason: Read quoted post wrong, and now disagree with statements made. |
Appreciate
0
|
01-09-2020, 11:08 PM | #102 | |
Banned
756
Rep 2,149
Posts |
Quote:
His reasoning doesn't prove no one follows sizing standardization since we do not know what the standard size tolerances are without purchasing the $125 guide book. It's totally possible hancook rs4 and bridgestrone re71r can be different sizes and still fit within standard tolerances. Also, the standardization is not required for snow tires. I believe what visualecho is doing is mistaking treadwear standards with treadwidth standards. There are treadwear standards, but the test is kinda flawed to where mfgs extrapolate data to give ratings. So manufacturers assign whatever number they see fit after running a standardized test. Leading to treadwear numbers not being comparable between mfgs. This has nothing to do with tire sizing though. Last edited by Anthony1s; 01-09-2020 at 11:19 PM.. |
|
Appreciate
1
CSBM52722.50 |
01-10-2020, 05:35 AM | #103 |
Brigadier General
2723
Rep 3,337
Posts |
^^ Exactly. There is an envelope for every tire size that it must fall within when mounted on the mandated measuring rim width wheel and inflated to the specification. There is variation in each dimension possible for each size hence the reason you see some tires at extremes of the envelope. In the EU, for a tire to be legally sold with the required "e" or "E", it must meet the ETRTO specs.
One example I'm familiar with from years ago relates to a specific manufacturer's 265/35-18 DOT R-comp tire. It has a very unusual sidewall to tread face design in that it's tread width is essentially the maximum section width too (i.e. no taper from max section width to tread face, essentially never seen in a "normal" tire). Additionally, it's section width when measured with the specified wheel width was 272 mm. All of that fit within the TRA specification for that tire size. The tires would rub like hell on some cars where other "265/35-18" tires would not. Since that time other tires have started exploiting the carcass design philosophy of that tire in street tire compounds (i.e. BFG Rival, RE-71R to some extent, etc.)
__________________
Current Stable:
2024 G20 M340i Melbourne Red/Cognac 2019 F87 M2 Competition 6MT, LBB, slicktop, exec pkg 2007 E91 328i Silver, slushbox, Eibach fr/E93 M3 rear sway bars, ARC-8 |
Appreciate
0
|
01-10-2020, 07:47 AM | #104 | |||
Banned
6637
Rep 4,145
Posts
Drives: '18 M2 6MT
Join Date: Sep 2019
Location: Missouri
|
Quote:
Quote:
When Hoosier released their new R7 (the successor to the A6), they caused thousands of rubbing issues because the new design ran significantly wider. In fact, the R7 225/45 fit nearly identical to the R6 245/40. Quote:
These manufacturer-tweaked tires don't concern me much because they are supposed to be fitted to specific cars. My position is, and will remain, that even though there might be a general standardization (simply because manufacturers make more than one size of tire), there is no real standardization because my real-world experience has shown me that exact tire sizes vary significantly. If you want to argue these points feel free to do so, but I won't be participating, as I've explained my experience, and nothing you say is not going to change my experience. |
|||
Appreciate
0
|
01-10-2020, 08:52 AM | #105 | ||
Banned
756
Rep 2,149
Posts |
Quote:
Quote:
That's confirmation bias, so you wouldn't really be a productive part of the conversation due to that anyway. Last edited by Anthony1s; 01-10-2020 at 12:21 PM.. |
||
Appreciate
1
CSBM52722.50 |
01-10-2020, 02:38 PM | #106 | |
Lieutenant
815
Rep 558
Posts |
Quote:
What I'm trying to say is: Love the 285/35 rears but the 255/35 fronts are shorter and it makes it look odd. Reminder: stock suspension |
|
Appreciate
0
|
01-10-2020, 02:44 PM | #107 | |
Major General
7252
Rep 7,429
Posts |
Quote:
__________________
Click on the link below to see a compiled list of every review I have ever written:
https://f87.bimmerpost.com/forums/sh...2#post30368242 |
|
Appreciate
1
SCCThree814.50 |
01-10-2020, 02:47 PM | #108 | |
Major General
7252
Rep 7,429
Posts |
Quote:
The second number matching doesn't mean anything, it doesn't necessarily have to match. What the second number represents is aspect ratio, ratio of width to rim size. So you need to pick an aspect ratio that results in an overall tire height that is within 3% of factory overall height in order to avoid issues. There's a calculator online to determine it. But an example is if you go significantly wider than factory with the same height you'll need a smaller aspect ratio to keep the same or similar overall height.
__________________
Click on the link below to see a compiled list of every review I have ever written:
https://f87.bimmerpost.com/forums/sh...2#post30368242 |
|
Appreciate
1
SCCThree814.50 |
01-10-2020, 03:09 PM | #109 |
Private First Class
228
Rep 198
Posts |
I have 285/35R19 rear, 255/35R19 front (Michelin Alpine PA4 winter tires). There is no rub. However, I also think it looks strange to have so much of a size difference.
If you are willing to modify your wheel liners for more clearance, 285/35R19, 265/35R19 may be the best option. The 285/265 setup fills the wheel arches better, provides a softer ride, provides slight longer gearing, and compensates for the speedometer reading low from the factory. The 275/35R19 rear, 255/35R19 front is a better choice if you aren't willing to modify your wheel well liners.
__________________
Last edited by DriverDaily; 01-10-2020 at 03:19 PM.. |
Appreciate
0
|
01-10-2020, 03:31 PM | #110 | |
Major General
7252
Rep 7,429
Posts |
Quote:
__________________
Click on the link below to see a compiled list of every review I have ever written:
https://f87.bimmerpost.com/forums/sh...2#post30368242 |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|