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      12-30-2020, 02:14 AM   #1
rak299
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Can I put a spare tire in the trunk?

Maybe I am the only one, but the car weighs almost two tons so it is never going to be lightweight. I expect to use the car as a daily driver and I would like the option of a small tire and jack like there is for the G20.

Is there a reason it won't work?
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      12-30-2020, 02:50 AM   #2
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M cars don't have spares because it saves weight. They come with a tire patch kit with an air compressor. You could put a spare in the trunk with a small jack I guess, but if you have the AWD G80, you have to match the rolling diameter or risk damaging the AWD system. I don't know how the rear LSD will react to a small spare on the RWD M3/4.
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      12-30-2020, 03:57 AM   #3
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Quote:
Originally Posted by jmg View Post
M cars don't have spares because it saves weight. They come with a tire patch kit with an air compressor. You could put a spare in the trunk with a small jack I guess, but if you have the AWD G80, you have to match the rolling diameter or risk damaging the AWD system. I don't know how the rear LSD will react to a small spare on the RWD M3/4.
The X3/4M have spares available from the factory. I believe ditto the X5/6M. They all have staggered tire sizes and rear LSD.
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      12-30-2020, 08:36 AM   #4
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Originally Posted by Young04 View Post
The X3/4M have spares available from the factory. I believe ditto the X5/6M. They all have staggered tire sizes and rear LSD.
X3/4 M are staggered? Good to know. What's the recommended range on the spare. Something like 50 miles? I know on my Audi's and Subaru's I couldn't even mix and match tire tread wears, they all had to be about the same, but that's for daily use. If the range is only 50, I believe the Mobility Kit is the same and you don't have to jack the car up or swap the wheels.
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      12-30-2020, 08:39 AM   #5
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Originally Posted by jmg View Post
X3/4 M are staggered? Good to know. What's the recommended range on the spare. Something like 50 miles? I know on my Audi's and Subaru's I couldn't even mix and match tire tread wears, they all had to be about the same, but that's for daily use. If the range is only 50, I believe the Mobility Kit is the same and you don't have to jack the car up or swap the wheels.
Yeah, probably 50 miles (and 50mph too, I think). OP can do both if he wants to be super safe. There are some types of tire damage that the Mobility Kit cannot fix.

Tire sizes are only slightly staggered on X3M. Mine is 255/40/21 and 265/40/21.
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      12-30-2020, 09:36 AM   #6
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Quote:
Originally Posted by rak299 View Post
Maybe I am the only one, but the car weighs almost two tons so it is never going to be lightweight. I expect to use the car as a daily driver and I would like the option of a small tire and jack like there is for the G20.

Is there a reason it won't work?
Glad you didnt ask if you could connect a caravan or trailer!? Hahahaha

Just kidding... Great new year to you!!
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      12-30-2020, 09:47 AM   #7
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the patch kit does come with the car but I know first hand knowledge it doesn't always help or work. I was stranded on the famous HWY 1 out here in CA for 5 hours waiting for a tow truck one year due to a flat. Tire patch kit didn't do squat. I told myself I would consider putting a spare wheel in my trunk if I ever were to go on a trip like that again. I knew a lot of members on here who were commenting in that thread also that did the same. I think its smart even just to get you close by where you can address the problem. But I personally would only consider this on a trip where I know the route would be isolated such as the situation I was in on HWY 1. I wouldn't do it for a DD on my normal commutes
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      12-30-2020, 11:09 AM   #8
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I will be getting base model (RWD only). The only reason I want G80 is it is the only way to get MT. I have a mountain cabin in a remote location and I go there a lot. 50 miles would get me to civilization. I could buy the G20 part but there is no place to mount it conveniently
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      12-30-2020, 11:19 AM   #9
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My current M340i came with run flats which were swapped out to Michelins PS4S and all I did was buy the Tire inflator repair kit on Amazon since my car didn't come with one. Car is my daily driver and where I live and work doesn't require me to lug around with a spare daily since it's a Metro area.

I have gone as far as Key West, FL thus far in the car without worries. In my case, a spare would only be necessary if I was crossing state lines or traveling thru rural areas, none of which I do.

My old E46 that came with a factory spare was used no more than 5 times over a span of ten years. And in those instances, spare was on for a day at most.
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      12-30-2020, 02:47 PM   #10
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Quote:
Originally Posted by rak299 View Post
I will be getting base model (RWD only). The only reason I want G80 is it is the only way to get MT. I have a mountain cabin in a remote location and I go there a lot. 50 miles would get me to civilization. I could buy the G20 part but there is no place to mount it conveniently
I would buy an actual wheel with the same dimensions given the remoteness of your cabin and get a PS4S tire and keep it in the trunk. You'll lose a lot of your usable trunk space and I personally would only take it when I was going to this cabin.

I keep an amazon tire pump on me at all times. It plugs into the cigarette lighter.
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      12-30-2020, 04:51 PM   #11
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Quote:
Originally Posted by rak299 View Post
I will be getting base model (RWD only). The only reason I want G80 is it is the only way to get MT. I have a mountain cabin in a remote location and I go there a lot. 50 miles would get me to civilization. I could buy the G20 part but there is no place to mount it conveniently
Just get a tire tote and stick it in the trunk.
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      12-30-2020, 04:54 PM   #12
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Quote:
Originally Posted by frankiebones View Post
Quote:
Originally Posted by rak299 View Post
I will be getting base model (RWD only). The only reason I want G80 is it is the only way to get MT. I have a mountain cabin in a remote location and I go there a lot. 50 miles would get me to civilization. I could buy the G20 part but there is no place to mount it conveniently
I would buy an actual wheel with the same dimensions given the remoteness of your cabin and get a PS4S tire and keep it in the trunk. You'll lose a lot of your usable trunk space and I personally would only take it when I was going to this cabin.

I keep an amazon tire pump on me at all times. It plugs into the cigarette lighter.
The cordless pump is a lifesaver both on the track and for road trips. Debeaded when I spun out at 100+ and the pump popped it right back into place. Now I take it on every road trip too.

It charges through a wall socket or your car's lighter, but the battery lasts for a long time. I pumped up all my buddies cars after a track day, 4 cars, 16 tires, and didn't even put a dent in the battery bars.

https://www.amazon.com/dp/B07CTGM2LD..._WdQkdWM3cY7ua
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      12-30-2020, 09:17 PM   #13
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I have gotten spares for almost all of my M cars. A good place to get them and the associated equipment--jack, etc.--is Bimmerzone: https://bimmerzone.com/collections/bmw-spare-tire

God bless,
TT
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      12-31-2020, 07:39 AM   #14
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Quote:
Originally Posted by rak299 View Post
I will be getting base model (RWD only). The only reason I want G80 is it is the only way to get MT. I have a mountain cabin in a remote location and I go there a lot. 50 miles would get me to civilization. I could buy the G20 part but there is no place to mount it conveniently
Smart to get a spare if it would be subject to cold weather snowy conditions at times. Winter increases the likelihood of a flat with all the broken roads due to plows, and makes being stranded that much more of a risk. As an added bonus, the extra weight from the spare will help with traction in snow/ice.

If its summer and you dont feel the need, remove the spare for better driving, handling. When it turns over to winter, put the spare in for extra peace-of-mind. I used to do the same for my RWD 3 series. Currently have AWD and no spare.
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