05-07-2018, 11:46 AM | #1 |
Private First Class
36
Rep 167
Posts |
Tire size
Hi,
I am looking to replace my tires on a 2012 X3 35I (19inch wheels). Currently i have non-run flats as i like them better then the run flats that came with the car. They are Yokohama Advan Sport A/S and i really like them, but they installed the same size on all 4 wheels (245 /45 R19), is this ok? as i think original equipment was 245 /45 R19 for the front and 275 /40 R19 for the rear? should i get the wider tires in the rear or keep all 4 the same? Thank you |
05-08-2018, 01:25 AM | #2 |
Private First Class
30
Rep 122
Posts |
I don't think they all came with a staggered set up. Remember reading something about 275s in the rear as standard for M-package in EU. In US we got 245s all around from the factory, so you should be fine.
|
Appreciate
0
|
05-08-2018, 05:29 AM | #3 |
Second Lieutenant
73
Rep 299
Posts |
|
Appreciate
0
|
05-08-2018, 08:08 AM | #4 |
Major
312
Rep 1,086
Posts |
What is the max tires sizes you can install in a square setup like ours in the usa? or you better of buying a new set of tires and rims all together?
__________________
2016 M3, Mineral White, SO Leather, MANUAL - ED 11/26/2015
2013 335i, Blue, M-Sport, Auto w/Sport Trans - ED 06/10/2013 |
Appreciate
0
|
05-08-2018, 10:35 PM | #6 | |
Brigadier General
3443
Rep 4,102
Posts |
Quote:
Anyhow, are your wheels staggered, that is are the fronts and rears different widths? If so staggered tires is fine too. If the wheels are all the same width you'll want the tires to be as well. You could do some changes but it's a less compelling case for doing so. |
|
Appreciate
0
|
05-09-2018, 03:50 PM | #7 | |
Private First Class
36
Rep 167
Posts |
Quote:
Thanks |
|
Appreciate
0
|
05-16-2018, 05:28 PM | #8 |
New Member
7
Rep 11
Posts |
Hi, how does one check if the new rims are 100% fitting?
I didnt change my rims on my cars for decade and stayed with the original ones for a long time. Now that I have bought an X3 and want to upgrade from 17 inch to 19 inch I am wondering how does one find out if the new rims will fit 100% if they havent been mounted on an X3 before? For instance my rims are 225/60R17 ; 7.5 ET32 The ones I am looking for are just announced with 245/45/19 in the front and 285/40/19 in the rear. They were installed on an e65 (BMW 7) before. (If I check BMW 7 infos they can only have following dimensions: 19x9 24 245/45R19 19x10 24 275/40R19 BMW 7) How do I know if they fit? I tried that page: https://www.willtheyfit.com But I want a second opinion. -Thanks in advance cause I cant create a new thread at this moment. |
Appreciate
0
|
05-17-2018, 04:08 PM | #9 |
Brigadier General
3443
Rep 4,102
Posts |
Width, center bore, and offset are the main things.
Width is a range to suit the tires, for 245 tires it's going to be about 8.5 or 9" (245mm = 9.6 inches, ideally you want the wheel to be a little less than that). For 275 tires it's going to be about 9.5 or 10". Center bore needs to match. If it's a lot bigger you can use a ring that has the correct inner and outer diameters. If it's slightly bigger you shoudl avoid the wheels as there won't be enough room for a ring. If new wheels are smaller bore, things won't fit to begin with. 245 and 275 tires are fine for width, I have them from the factory. Your aspect ration (45 and 40 are sidewall height as a % of tire width. Again yours match the factory. So it really comes down to offset. What is it for the new wheels? Too high and they might rub the suspension, too low and they might rub the fender sheet metal. Mine are 38 front and 48 rear, but there is an acceptable range they can be changed within. |
Appreciate
0
|
05-18-2018, 05:48 AM | #10 | |
New Member
7
Rep 11
Posts |
Quote:
Thanks for trying to explain it to me. It's not as easy as it might be So far my X3 has 225/60 R17, 7.5Jx17 ET32 dimensions on all 4 tires (because of All-whee-drive) I have put eyes on these rims though: https://www.shpock.com/i/WuQ24rF4Zk-Le2Jr/ They were on an e65 (BMW 7) ! I cant tell if they will fit or cause any problems like you mentioned. |
|
Appreciate
0
|
05-18-2018, 04:00 PM | #11 | |
Brigadier General
3443
Rep 4,102
Posts |
Quote:
For offset, you will have to ask the seller what kind of wheels they are to find out. I don't recognize them and if I google E65 wheels it doesn't look like a factory option. Also note that it looks like their rear tire is 285 wide, meaning your offset really needs to be correct to be sure that tire still fits. My offsets are 38mm F, 48mm rear, stock. If I am correct, it appears factory offset for the E65 7-Series is 24mm front and back. That is a big change (distance in mm). The lower offset would push the wheels further away from the car. My guess is that they will rub and you will not be happy. Sorry. |
|
Appreciate
0
|
05-18-2018, 04:12 PM | #12 | |
New Member
7
Rep 11
Posts |
Quote:
So I was looking for rims with a low offset like > 20mm. I noticed that a lot of original X3 rims have a even higher offset of 42mm though. So regarding this site: http://www.reifenrechner.at/ the wheels I want to put on are going to stand out on the inner side a bit more...... I am still confused what offset is better for bigger rims cause I want to go from 17 inch to 19 inch that's for sure. I guess I will continue looking for other rims I am 100% sure they fit on an X3 before I buy something I will regret. |
|
Appreciate
0
|
05-19-2018, 10:16 AM | #13 |
Brigadier General
3443
Rep 4,102
Posts |
Well, too far in and they will rub the suspension. Too far out and they will rub the metal part of the wheel well (the body of the car).
Stock is 38 front & 48 rear for the M-Sport, we know that works with the wider wheels and tires. I'm sure you could go a little bit different either way, but I don't know how much. Maybe 5mm? Maybe 10? I'm sure that going more than 20 and almost 30 would be too much. You will have to do some research on what wheels people use and if they had a problem or not. Pay attention to their tire size when you gather information. The best thing to do is have a shop that sells the wheels do a test fitment first, and only sell you something that will work. If you buy online you take a risk of it not working. Unless you stick around the 38 / 48 numbers and don't go too far off of that. Again, you can vary from 38 / 48, but how far is unknown. By the way, offset does not matter for 17, 18, 19, or even 20" wheels. It's not the diameter that is important, it's the width of the wheel and the offset that determines if you will rub on something. Assuming of course that you have the right size tires! |
Appreciate
0
|
05-21-2018, 08:34 AM | #15 |
Colonel
1233
Rep 2,928
Posts |
Just to make sure you understand, if you replace wheels with the same width as you have, then you want ones with an offset that is more or less the same as your old wheels. But if you are getting wider wheels, then you need to take that into account, but only HALF of the new width. Offset is the measurement between the mounting flange of the wheel and the center line of the wheel. So if you buy new wheels one inch wider (25mm), half of that inch is on each side of the center line. So you need to consider half of that (12-13mm) when figuring offset. So if your offset now is 30, and you buy wheels one inch wider, the offset on your new wheels should be about 18 or so. As another poster said, you have a range to play with, so 20 would probably be fine.
|
Appreciate
0
|
05-21-2018, 10:33 AM | #16 |
Private First Class
36
Rep 167
Posts |
Thanks for all the responses, i went with the stock sizes:
245 45 R19 as this was the stock setup, reason i was asking is because these cars came with different wheels and i wasn't sure if mine was wider in the rear.. |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|