How to fit a space saving spare under regular trunk

WUR · 06-13-2021, 03:41 PM

I custom ordered my '20 M40i with the factory space saver spare tire which I assume, and hope, fits.

Drexel_Lake · 06-13-2021, 03:51 PM

Quote:

Originally Posted by WUR

I custom ordered my '20 M40i with the factory space saver spare tire which I assume, and hope, fits.

You should be fine. Check this out and read the note about M series. https://www.amazon.com/Complete-Comp...ci_mcx_mr_hp_d

kevinkay · 08-14-2021, 07:44 AM

ugh....was all jacked up to do this when I needed new tires - but just realized this isn't going to work with 19" wheels??
OR is it the same donut with 18" or 19" wheels?

Proctorw · 08-14-2021, 08:20 AM

Non run flats, standard cargo capacity, service contract with AAA, flat-bed tow to nearest repair shop.

Isawelvis · 08-18-2021, 05:44 PM

My 2021 X3 came with 19 inch non run flatl and has factory spare. I don't think it makes any difference what size tire comes on your car , the same size spare fits them all. The only issue is that on some models like the completion, it may not fit over the front brakes. you could move the rear to the front and then put the spare on the rear.

sbt007 · 08-18-2021, 06:49 PM

They have the same spare for all M40i's. I believe it is 18" - there is a thread with a photo of size. There is no reason to believe it will not clear the M-sport brakes. Many 18" winter wheels do as well.
The X3Ms come with a 19 inch donut because I think those brakes are even bigger.

Intruderm · 10-22-2021, 12:29 PM

Quote:

Originally Posted by teaston

I don’t understand why BMW didn’t do this instead of raising the boot floor!?

Yeah, weird because the X4 doesn't have the floor raised with a spare.

gasnet · 10-24-2021, 12:14 PM

I have a spare rim and tire on the side of my house. Jack and breaker bar in my Z4 trunk. (Z4 has non runflats and blowouts on those tires is common) I just uber myself the tire if i'm local.
I think i will do the same on my X3. And since i have the room now will just throw a spare in the back on a long trip. I hate runflats also.

gasnet · 10-24-2021, 03:31 PM

Since where on this subject. I was wondering if it would be cheaper to get a donut spare off ebay intended for Audi VW . The bolt pattern is 5x112 which BMW has now switched over to also. Anyone want to weigh in?

Drexel_Lake · 11-13-2021, 01:58 PM

I decided to ditch the run flats and carry a traditional tire plug kit along with the mushroom type plugs, and 12 VDC air pump. It all fits into the space easily. We also have roadside assistance, so if I can't or don't feel like fixing it I can have it towed.

I think I've had two flats in 48 years of driving. One I changed with a spare and one I plugged on the side of the road, even though I had a spare. It was just easier.

kevinkay · 12-07-2021, 06:15 AM

LOVE to know if this VW/audi collapsible would fit??

x3Prancer · 12-07-2021, 11:08 AM

By the looks of it, that spare is too wide to fit

kevinkay · 12-08-2021, 06:39 AM

Quote:

Originally Posted by x3Prancer

By the looks of it, that spare is too wide to fit

Maybe a waste of time because it's not confirmed an audi wheels is same bolt pattern. But your thinking the width because the BMW donut is narrower than the spare rim (so your talking hight?)
I will be needing new tires VERY soon and like to mimic this spare hack - THANKS for posting!

abbike18 · 12-13-2021, 09:20 AM

Just got a M40i and did this....can confirm it fits but it is tight. I opted to just remove the floor trim so I don't have to cut and modify it, and can always return to stock. Plus now there is more room in there for little tools and bits etc.

kevinkay · 12-13-2021, 11:12 AM

Quote:

Originally Posted by abbike18

Just got a M40i and did this....can confirm it fits but it is tight. I opted to just remove the floor trim so I don't have to cut and modify it, and can always return to stock. Plus now there is more room in there for little tools and bits etc.

Can you give us the PSI you took the donut down to fit?

abbike18 · 12-13-2021, 12:10 PM

Quote:

Originally Posted by kevinkay

Can you give us the PSI you took the donut down to fit?

About 10....its basically a flat tire with a mounted bead.

75fusca · 12-13-2021, 02:26 PM

Looks great! So, to be sure, you still have the floor cover above, correct?

abbike18 · 12-13-2021, 04:16 PM

Quote:

Originally Posted by 75fusca

Looks great! So, to be sure, you still have the floor cover above, correct?

Yes, correct. I reinstalled the floor. Without lifting the floor everything looks the same. There is actually space between the tire and the floor. I might put something on top of the tire to help support the floor - I removed a big styrofoam piece that clearly helped support the floor. It isn't weak, but you can def flex it now.

dtox9 · 12-13-2021, 04:23 PM

Quote:

Originally Posted by abbike18

Yes, correct. I reinstalled the floor. Without lifting the floor everything looks the same. There is actually space between the tire and the floor. I might put something on top of the tire to help support the floor - I removed a big styrofoam piece that clearly helped support the floor. It isn't weak, but you can def flex it now.

How do you have the tire secured in the space?
or does it just sit there loose?

75fusca · 12-13-2021, 06:33 PM

Quote:

Originally Posted by abbike18

Yes, correct. I reinstalled the floor. Without lifting the floor everything looks the same. There is actually space between the tire and the floor. I might put something on top of the tire to help support the floor - I removed a big styrofoam piece that clearly helped support the floor. It isn't weak, but you can def flex it now.

Thank you!

Seems that there are a few points available to install some strapping for securing the tire.

abbike18 · 12-13-2021, 06:35 PM

Quote:

Originally Posted by 75fusca

Thank you!

Seems that there are a few points available to install some strapping for securing the tire.

Yeah there are. I still need to figure out how I'm going to strap it down. I'll try to update once I do.

JC210 · 12-13-2021, 10:28 PM

Quote:

Originally Posted by abbike18

Yes, correct. I reinstalled the floor. Without lifting the floor everything looks the same. There is actually space between the tire and the floor. I might put something on top of the tire to help support the floor - I removed a big styrofoam piece that clearly helped support the floor. It isn't weak, but you can def flex it now.

If there is space between the tyre and the floor, would a 245 tyre fit in there?

06-13-2021, 03:41 PM	#67
WUR Private 24 Rep 50 Posts Drives: 2020 M40i Join Date: Jun 2020 Location: MD iTrader: (0)	I custom ordered my '20 M40i with the factory space saver spare tire which I assume, and hope, fits.
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08-14-2021, 07:44 AM	#69
kevinkay Lieutenant 306 Rep 513 Posts Drives: X3 Join Date: Oct 2018 Location: Boston, MA USA iTrader: (0)	ugh....was all jacked up to do this when I needed new tires - but just realized this isn't going to work with 19" wheels?? OR is it the same donut with 18" or 19" wheels? Last edited by kevinkay; 08-14-2021 at 08:04 AM..
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08-14-2021, 08:20 AM	#70
Proctorw Enlisted Member 6 Rep 41 Posts Drives: 2018 BMW M4 Join Date: Feb 2018 Location: Charlotte NC iTrader: (0)	Non run flats, standard cargo capacity, service contract with AAA, flat-bed tow to nearest repair shop.
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08-18-2021, 05:44 PM	#71
Isawelvis Second Lieutenant 107 Rep 292 Posts Drives: 2023 X4 M40i, 2024 Lexus RX350 Join Date: Dec 2020 Location: Illinois iTrader: (1)	My 2021 X3 came with 19 inch non run flatl and has factory spare. I don't think it makes any difference what size tire comes on your car , the same size spare fits them all. The only issue is that on some models like the completion, it may not fit over the front brakes. you could move the rear to the front and then put the spare on the rear. __________________ NKAWTG-N
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08-18-2021, 06:49 PM	#72
sbt007 Major 705 Rep 1,148 Posts Drives: 2021 X3 M40i Join Date: Feb 2012 Location: CA iTrader: (0) Garage List 2021 BMW X3 M40i [10.00]	They have the same spare for all M40i's. I believe it is 18" - there is a thread with a photo of size. There is no reason to believe it will not clear the M-sport brakes. Many 18" winter wheels do as well. The X3Ms come with a 19 inch donut because I think those brakes are even bigger. Last edited by sbt007; 08-18-2021 at 07:30 PM..
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10-24-2021, 12:14 PM	#74
gasnet Lieutenant 296 Rep 410 Posts Drives: 2020 Z4 M40i Join Date: Jan 2013 Location: NY iTrader: (0)	I have a spare rim and tire on the side of my house. Jack and breaker bar in my Z4 trunk. (Z4 has non runflats and blowouts on those tires is common) I just uber myself the tire if i'm local. I think i will do the same on my X3. And since i have the room now will just throw a spare in the back on a long trip. I hate runflats also. __________________ Garage 2014 Z4 35is RIP /2016 Z4 28i RIP 2015 335i RIP 2016 Audi A7 RIP / 19 Genesis G80 RIP 2020 Z4 M40i / 2022 X3
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10-24-2021, 03:31 PM	#75
gasnet Lieutenant 296 Rep 410 Posts Drives: 2020 Z4 M40i Join Date: Jan 2013 Location: NY iTrader: (0)	Since where on this subject. I was wondering if it would be cheaper to get a donut spare off ebay intended for Audi VW . The bolt pattern is 5x112 which BMW has now switched over to also. Anyone want to weigh in? __________________ Garage 2014 Z4 35is RIP /2016 Z4 28i RIP 2015 335i RIP 2016 Audi A7 RIP / 19 Genesis G80 RIP 2020 Z4 M40i / 2022 X3
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11-13-2021, 01:58 PM	#76
Drexel_Lake Private 28 Rep 92 Posts Drives: BMW X3 M40i 330cic Join Date: May 2021 Location: South Carolina USA iTrader: (0) Garage List 2020 BMW X3 M40i [10.00] 2005 BMW 330ci [5.00]	I decided to ditch the run flats and carry a traditional tire plug kit along with the mushroom type plugs, and 12 VDC air pump. It all fits into the space easily. We also have roadside assistance, so if I can't or don't feel like fixing it I can have it towed. I think I've had two flats in 48 years of driving. One I changed with a spare and one I plugged on the side of the road, even though I had a spare. It was just easier. __________________ 2020 X3 M40i Blue 2005 Supercharged 330ci Silver/Black vert.
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12-07-2021, 06:15 AM	#77
kevinkay Lieutenant 306 Rep 513 Posts Drives: X3 Join Date: Oct 2018 Location: Boston, MA USA iTrader: (0)	LOVE to know if this VW/audi collapsible would fit??
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12-07-2021, 11:08 AM	#78
x3Prancer Private 102 Rep 94 Posts Drives: 2019 X3 sDrive30i Join Date: Jan 2021 Location: SouthEast USA iTrader: (0)	By the looks of it, that spare is too wide to fit
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12-13-2021, 09:20 AM	#80
abbike18 Lieutenant 855 Rep 592 Posts Drives: 2019 BMW X3 M40i Join Date: Jul 2019 Location: Colorado, USA iTrader: (0)	Just got a M40i and did this....can confirm it fits but it is tight. I opted to just remove the floor trim so I don't have to cut and modify it, and can always return to stock. Plus now there is more room in there for little tools and bits etc. Attached Images __________________ 2019 X3 M40i \| TU Pump \| AA DP \| VTT GC \| xHP Stage 2 \| Dorch ECA \| MHD Odin FF \| Carbon Black \| Adaptive Suspension \| M-Sport Rear Diff \| 20" staggered SOLD! 2015 X1 35i \| Alpina Trans Tune \| Dinan Stage 2 \| Bilstein B6
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12-13-2021, 02:26 PM	#83
75fusca Private First Class 37 Rep 145 Posts Drives: 2018 BMW X3 30i Join Date: Feb 2014 Location: Canada iTrader: (0)	Looks great! So, to be sure, you still have the floor cover above, correct? __________________ 2018 X3 30i / Alpine White
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