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KEEP M3POST ALIVE BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER LINK! |
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03-02-2009, 10:10 PM | #23 | |
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135/80-18 calcs at 2 x .80 = 1.6 x 135 = 216/25.4 = 8.5 + 18 = 26.5" OD. That's closer on both front and rear than the 125/70s (only 0.2" off in rear). I would go for the Caddy size, myself. I am not 100% sure of the CB and ring. Ben at Tire Rack says, "I would guess that the X6 spare may not be machined in such a way as to accept a centering ring, but have not tried it myself to find out. My database has the X6 listed as a staggered centerbore (!), so BMW may have some kind of ring to use if the spare is going on the "small" hub. I do have part # 72.56RING which goes from 74mm to 72.56mm. I have no guarantee that this would work, but if I had to try something, that is what I would use." With a steel wheel, as Ben says, a standard alloy wheel ring may not work. Worst case is you may get a slight vibration without the ring, but hey, it's an emergency, right? Rings are cheap, though, so you could try one. So, jury is out. Care to be a test case?!! Edit 3/3: My parts guy says the wheel is $165.
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 Last edited by GregW / Oregon; 03-03-2009 at 11:44 AM.. |
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03-04-2009, 10:11 AM | #24 | |
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I think you may be right: the 135/80-18 size might be a better overall fit. On the other hand, I asked Mike Miller about the effect of the smaller size on the dif and he assured me it's not a problem. I'll try the plastic centering ring and let you know how it works. Godspeed, Tom |
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03-04-2009, 10:29 AM | #25 |
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I agree with the plug kit... I have pluged a slice in the sidewall with several plugs at a time, used the goo in the BMW tire recue kit and was able to get the car to a suitable location.
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03-05-2009, 10:29 PM | #26 | |
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At the site you mention I find 74/72.56 but not 74.1/72.56. Godspeed, Tom |
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03-05-2009, 10:48 PM | #27 |
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Maybe is misquoted the CB spec, but 0.1 mm is 1/254", which is inconsequential.
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 |
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03-09-2009, 09:12 AM | #28 |
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I ordered the X6 spare wheel from Tischer and a 125/70 18 tire from Tire Rack. However, the X6 wheel is 6" inches wide; I haven't tried it yet, but it looks like there is no way that a 125mm tire is going to fit on the 152mm rim.
The stock tire for the X6 is a 155/90 18, which is 2.5" bigger in diameter than the 265/40 18 rear tire. I called Tire Rack to see if they have something closer (like maybe a 155/70 18), but they don't. The only thing they've got is the 155/90. I am thinking that a 2.5" difference in diameter is too much, even for a temp. spare; I am also thinking that a 135 mm tire cannot be stretched to fit on a 6 inch rim. If I'm wrong about either of those, or if anyone has any other ideas, feel free to post. |
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03-09-2009, 12:28 PM | #30 | |
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 Last edited by GregW / Oregon; 03-09-2009 at 01:11 PM.. |
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03-09-2009, 12:56 PM | #31 | |
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http://www.realoem.com/bmw/showparts...18&hg=36&fg=10 Here's a light alloy 18" wheel with a 40 mm offset from an X5--looks like 5" across. http://www.realoem.com/bmw/showparts...44&hg=36&fg=95 Actually, it looks like my measuring skills are not what they could be, as the X6 wheel is listed as being 5" wide, not 6--at least, if I am reading the catalog right: http://www.realoem.com/bmw/showparts...25&hg=36&fg=10 Of course, looking at the catalog more closely I see another potential issue--the lug bolts are different for the X5/X6 and the 3er. All of this would be much easier if BMW would just make a frigging wheel for the E90 M3. |
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03-09-2009, 01:17 PM | #32 | |
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Yes, wish BMW would address this issue. It would not take that much to do a wheel.
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03-11-2009, 09:22 AM | #33 |
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X6 Space Saver Wheel for E9X M3
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The X6 space saver spare wheel appears to be about 5" wide. This wheel, mounted with the 125/70-18 space saver spare tire and in a Tire Tote takes up about 5.5" of trunk space. There's still plenty of trunk space left. My car's been driven while having this wheel/tire combo mounted on the left front and it works just fine. As I wrote earlier, the only problem is the difference in the diameters of the center bore of the X6 wheel and the E9x M3's hubs, which requires very careful tightening of the lugs to properly center the wheel on the hub. Hopefully, the centering rings Greg found (and that I just ordered) will take care of that. Godspeed, Tom Last edited by TomTarzian; 03-11-2009 at 09:38 AM.. |
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03-11-2009, 11:52 AM | #34 | |
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So you successfully mounted the 125 on the X6 wheel? Huh--good to hear. I guess I'll give it a shot. Thanks! I'll post results once I have them. |
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03-11-2009, 02:58 PM | #35 |
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I still think the 135 Caddy tire would be a better match in both width of the wheel and OD to stock.
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03-11-2009, 03:28 PM | #36 |
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I've got a spare wheel and tire from my e39 M5 that I carry in the trunk if I'm driving cross country or something. A caddy tires from a 135 is a damn good idea though
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03-12-2009, 09:25 AM | #37 |
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It works. Had the tire mounted this morning; I agree with Greg that the 135/80 18 is probably a better choice, but rather than send back the 125/70 18 that I had ordered I decided to give that a go.
The tire guys laughed at me, but the tire popped right on to the rim. Looks kind of weird, but it works. Thanks, Tom, for the guidance on this. Also, I got the rings from 1010tires; despite being identified as 74-72.56 on the website, the actual rings are labeled 74.1-72.56, so they are exactly the right size. I haven't tried the wheel on the car yet, but based on Tom's findings I don't doubt it will work. So: X6 wheel, about $130. 125 70 18 tire, about 130 shipped. $15 to the guy for mounting. $30 for the rings. Here are some pictures. |
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03-12-2009, 05:07 PM | #38 | |
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Godspeed, Tom |
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03-13-2009, 06:47 PM | #39 | |
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True Faith,
If you don't mind me asking, where did you purchase your tire? Arcsynesis Quote:
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03-14-2009, 12:50 PM | #40 | |
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03-14-2009, 08:17 PM | #41 | |
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The wheel definitely clears the brake. I've had it mounted on the left front and driven--no problem. It also fits fine on the rear. Godspeed, Tom |
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03-16-2009, 09:47 AM | #42 | |
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As for the rings, they definitely fit in the wheel. Haven't tried the wheel or rings on the car yet, because the weather has been crap and I'm sort of waiting until I have to take the snow tires off anyway--maybe a couple of weeks. I'll post as soon as I confirm the rings do the job, but I don't have any reason to think they won't. |
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03-16-2009, 03:24 PM | #43 |
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$30 for the rings.
what are the rings? you mean spacer?
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03-16-2009, 03:29 PM | #44 |
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I have the old 330i spare from my e46. It looks like it may fit with a 25 or 30 mm spacer. anyone try this?
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