06-25-2019, 08:48 PM | #1 |
New Member
3
Rep 10
Posts |
Replace just one tire??
My son's 2017 M240i X-Drive has 10,500 miles on it and he's got a hole in the sidewall of his front passenger side tire. I'm not familiar with the BMW differentials so I don't know if he can replace just one tire, or if he needs to replace two, or even four. Can someone shed some light on this please?
|
06-25-2019, 09:23 PM | #2 |
New Member
14
Rep 29
Posts |
As a general rule replace two and move them to the rear, keeping the worn ones on the front. If they're within a 32nd or two you can replace them individually of you like. However, your ride quality and alignment spec can be thrown off somewhat.
|
Appreciate
1
8Bmw168.00 |
06-26-2019, 08:28 AM | #3 |
First Lieutenant
77
Rep 310
Posts |
Buy a used one on ebay that is within 2/32nd of the remaining good one. Used MPSS (not sure what you have) are $75-$100 usd. Or buy two new tires and sell the one good old one...
|
Appreciate
0
|
06-26-2019, 11:26 AM | #4 |
First Lieutenant
229
Rep 328
Posts |
I would strongly recommend replacing all four tires, especially if they are close to replacement. Even if they are just half way there, it is much safer to replace all four because of the transfer case on XDrive models will be confused if there is more than 2mm tread difference. And never buy used tires, you don't know what they've been through. If you can only replace one tire, buy a new one and find someplace that can shave it to the appropriate tread depth for you. |
Appreciate
0
|
06-26-2019, 11:45 AM | #5 |
Brigadier General
4348
Rep 3,490
Posts |
Tire Rack will shave tires to the buyer's desired tread depth.
__________________
2017 M240i: 23.8K, 28.9 mpg, MT, Sunroof Delete, 3,432#, EB, Leather, Driving Assistance Package, Heated Front Seats | Sold: E12 530i, E24 M635CSi, E39 520i, E30 325is, E36 M3 (2)
TC Kline Coilovers; H&R Front Bar; Wavetrac; Al Subframe Bushings; 18X9/9½ ARC-8s; 255/35-18 PS4S (4); Dinan Elite V2 & CAI; MPerf Orange BBK; Schroth Quick Fit Pro; GTechniq Crystal Serum Ultra Ceramic; Suntek PPF |
06-26-2019, 02:11 PM | #6 |
Lucky13
211
Rep 1,762
Posts |
The tires should go on the rear not the front, just google it. You do not ever want the rear end slipping out.
__________________
1995 325i, 1996 328ci, 1997 528i, 1997 Z3 2.8, 2000 528i, 2001 X5 3.0, 2001 330i Convertible, 2002 M3 Convertible, 2003 M3 Coupe, 2004 M3 Coupe, 2004 Z4 3.0, 2004 X3 3.0, 2007 X3 3.0, 2007 335i Convertible, 2013 X1 28 sdrive, 2014 M235 manual, 2020 X3 30i Xdrive
Last edited by Lucky13; 07-02-2019 at 09:03 PM.. |
Appreciate
0
|
06-26-2019, 03:53 PM | #7 | |
Car Geek
3612
Rep 3,576
Posts |
Quote:
Still better to have the tyres the same diameter through shaving or replacing tyres in pairs, but that diagram is just misleading rubbish. |
|
Appreciate
1
Apo Zubulthums10.50 |
06-27-2019, 06:03 AM | #9 |
msej449
514
Rep 717
Posts
Drives: M235i Convertible +LSD 2016
Join Date: Nov 2013
Location: South Coast UK & Swiss Alps
|
When I worked for a tyre manufacturer, because we got tyres fitted in the factory at cost, a lot of us would fit new ones annually. This because a lot of tyres give you disproportionately better braking distance down to 4mm (5/32"), and disproportionately worse on the remaining wear down to the legal minimum:
So you can console yourself that there's an upside to being forced to fit some new tyres e.g. at 4mm (5/32") this tyre stops the car in 24m (79ft) but at 2mm (3/32") the stopping distance at the same speed is 30m (98ft) - and that's on dry tarmac. This is why I generally think about replacing my tyres at some point between 4mm (5/32") and 3mm (4/32") even though the UK minimum is 1.6mm (2/32"). [Caveat: The graph is for one particular brand of performance tyre. As you might expect, different brands may have different profiles. So some make the curve more of a straight line, some wear less/more, some give you less initial adhesion but better worn adhesion etc. But for performance tyres, the common assumption is that if the owner can afford a performance model, then they can afford to replace tyres earlier than the legal minimum and want shortest braking distance before anything else.]
__________________
2016 M235i Convertible Estoril Blue & Oyster
2023 Peugeot e-208 GT (electric) Last edited by msej449; 06-27-2019 at 06:18 AM.. |
Appreciate
0
|
06-28-2019, 06:35 AM | #10 | |
Private
6
Rep 84
Posts |
Quote:
__________________
Past: 2013 128i Convertible.Deep Sea Blue .Savanna Beige Boston Leather.Light Burl Walnut trim.Premium .Technology.Cold Weather Package
Past: 2015 228xi Conv. Metallic Grey with all the fixins' Current: 230I Xdrive Metallic Black |
|
Appreciate
0
|
06-28-2019, 08:27 AM | #11 |
Major
593
Rep 1,219
Posts
Drives: 2015 M235ix
Join Date: May 2015
Location: United States
|
Ditto! Modern 'bicycle' tires get punctures and worse because their sidewalls have so little room to flex. I have replaced tires on my 235 at the rate of about one a year, all under warrantee. If I replaced two every time, that would be a lot of moolah. I understand the notion that a large difference in diameter will affect performance, but honestly, is it noticeable on a DD?
BTW, who is paying for the tires? |
Appreciate
0
|
06-28-2019, 08:30 AM | #12 | |
New Member
3
Rep 10
Posts |
Quote:
|
|
Appreciate
0
|
07-02-2019, 01:31 PM | #13 |
Colonel
3830
Rep 2,866
Posts |
FWIW, the stock staggered non-runflats have uneven diameters, with the rear being a bit smaller (25.1fr v. 24.8 rear) - .3 inches, which is about 7mm. Since this is the factory setup for sport driving, I think it is safe to assume it is within acceptable tolerances. This would support putting the new tires on front, since they would be larger, and match up with the factory 'stagger' (but theoretically, reversing this would just work the transfer case the same amount, but in the reverse direction, right?). I think it is more crucial to match on the same axle, via shaving or replacing both.
|
Appreciate
0
|
07-02-2019, 07:24 PM | #14 |
Lieutenant
230
Rep 555
Posts |
On AWD models the conventional wisdom is to replace all 4. But then again it depends on the circumstances. On RWD as long as the tires are close in wear on the same axle.
But I would imagine there are some tolerances, the tire shops will all say you need all 4, otherwise the transfer case will will go boom. Realistically as mentioned the stock setup if its staggered has a slight variation front to rear, so in the span of 1 mile, the rear tires will do about 10 extra revolutions. If the tires were halfway worn, I would replace 1 wheel on the same axle. If they are all close to being worn, why mess around? Replace all 4.
__________________
|
Appreciate
0
|
07-03-2019, 03:52 AM | #16 |
Major
593
Rep 1,219
Posts
Drives: 2015 M235ix
Join Date: May 2015
Location: United States
|
The inflated object in question was invented in Scotland by Dunlop, so I guess that the original spelling had a y. For me, it is a pneu.
|
Appreciate
0
|
07-16-2019, 08:45 PM | #18 |
Enlisted Member
15
Rep 42
Posts |
I recently replaced just one rear tire - took a nail and dealer told me non-repairable due to location. New car has only 5K miles and I am planning on getting 10K with the stock run-flats before I get new tires before winter. Put about 500 miles on new tire now and all good although that damn nail cost me nearly $400!
|
Appreciate
0
|
11-26-2022, 03:40 PM | #20 | |
Private
29
Rep 94
Posts |
Quote:
|
|
Appreciate
0
|
11-26-2022, 04:06 PM | #21 |
Major
345
Rep 1,012
Posts |
This is an old thread, but just chiming in that I've never had a problem getting my run flats patched just like a regular tire. This assumes you don't drive it a hundred miles while flat of course. If get a flat in the city, I drive it to the local tire shop ASAP and get it fixed. On the highway I carry a plug kit and small compressor so I can do a temporary fix, and then get it properly patched later. Obviously the same caveats apply as to regular tires eg sidewall punctures still can't be fixed.
|
Appreciate
0
|
11-29-2022, 05:16 PM | #22 |
Second Lieutenant
87
Rep 288
Posts |
I would add...RE: patching a tire... If you intend any performance driving (auto-x or on track driving events) I would not recommend driving on a patched tire.
__________________
'23 G01 BMW x3 M40i (via PCD Arp 2023)
'15 R59 MINI Roadster S '19 F22 BMW 230i xDrive THP (retired) '14 F31 M-Sport ED & PCD (retired) |
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|