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M2 Technical Topics > Wheels / Tires -- Sponsored by The Tire Rack > M2 Competition with 2NH Brakes Spare Wheel and Tire Options

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      01-27-2020, 02:11 PM   #1
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M2 Competition with 2NH Brakes Spare Wheel and Tire Options

Figured I would share some findings of my research into spare wheel and tire options for the M2 Competition fitted with the 2NH brake package

As many here are probably aware, Bimmerzone currently offers a spare wheel and tire package for M2s equipped with blue brakes

https://www.bimmerzone.com/bmw-2-ser...c89ecf1ff5e6c9

However, that kit will not clear the 2NH brakes

EDIT - Bimmerzone is now offering a kit for the M2 Competition at the link posted above

After discussing the issue with Vincent @ Bimmerzone, we thought that there was a good chance that the spare wheel made for the X5M might work, so I decided to give it a try

Here are some pics
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Last edited by 2020M2Competition; 03-10-2021 at 06:49 PM..
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      01-27-2020, 02:19 PM   #2
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Here are the specs for the X5M spare wheel

5x19" ET 4mm
5x120mm bolt pattern
74.0mm hub

Astute readers will note that the M2 uses a 72.56mm hub

As a result, a hub centering ring is needed (Bimmerzone provided me with an aluminum one)

The wheel does in fact clear the calipers, although it is very close

It spun freely without any interference or the use of a spacer

Nevertheless, a small spacer and extended lug nuts might not be a bad idea for additional clearance

Last edited by 2020M2Competition; 01-07-2021 at 11:57 PM.. Reason: Added Info
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      01-27-2020, 02:24 PM   #3
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As far as compact spare tires are concerned, I have only been able to find two options

Continental CST 17 - Size 125/70/19

https://www.tirerack.com/tires/tires...omCompare1=yes

Kuhmo T131 - Size 135/70/19

https://www.tirerack.com/tires/tires...R9KH&tab=Specs
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      01-27-2020, 02:41 PM   #4
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A few things to take into account about the above mentioned tires

Both were designed for slightly narrower rims (I don't think this will be a problem)

The Continental tire is probably a closer match to the stock tires in terms of diameter @ 25.9"

I have been unable to find some specs for the Kumho tire including diameter

A quick tire calculation based on its size would in theory place it around 26.4"

However, if the revs per mile listed by Tire Rack are accurate it's likely closer to 26.7"
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      01-27-2020, 02:49 PM   #5
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Disclaimer

Please use the this information at your own risk

It is solely intended to offer a potential emergency and/or temporary option in case of a flat

I have only test fit the spare wheel and tire while the vehicle was on a lift

I have not actually tested it on the road

Last edited by 2020M2Competition; 01-08-2021 at 12:05 AM.. Reason: Updated
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      01-27-2020, 05:08 PM   #6
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LOL! Gives new meaning to donut! 135/70?
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      01-27-2020, 05:37 PM   #7
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A large part of me wants to see 4 of these mounted on every single body color of M2.
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      01-29-2020, 03:18 AM   #8
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M2 Drag Pack would be hilarious
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      01-29-2020, 07:43 AM   #9
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How do you store this in your trunk?
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      01-29-2020, 08:41 AM   #10
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Quote:
Originally Posted by Insane_Dawe View Post
How do you store this in your trunk?
Jack, jack handle and lug wrench fit inside a foam tray which fits inside the wheel rim (all Genuine BMW parts) which is all stored inside a tire tote for easier handling

The entire assembly is then secured from moving around by using the four tie down points in the trunk

I use a BMW Luggage Compartment Floor Net and BMW Luggage Compartment Tie Down Straps to do this

I also have a BMW All Weather (rubber) Cargo Mat installed to provide a little extra protection
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      01-29-2020, 12:33 PM   #11
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Quote:
Originally Posted by VTBoss302 View Post
Jack, jack handle and lug wrench fit inside a foam tray which fits inside the wheel rim (all Genuine BMW parts) which is all stored inside a tire tote for easier handling

The entire assembly is then secured from moving around by using the four tie down points in the trunk

I use a BMW Luggage Compartment Floor Net and BMW Luggage Compartment Tie Down Straps to do this

I also have a BMW All Weather (rubber) Cargo Mat installed to provide a little extra protection
Excellent! I did this on my e46 M3 for road trips-- it was worth the peace of mind.

A few questions:

1. what tire diameter did you go with? Conti's or Kumho?

2. I'm assuming this clears both front and rear? (On my M3, if you got a flat on the rear, you had to swap a front to the rear, then install spare on rear.

3. do you have part numbers for jack, handle, wrench, and foam storage mount?

4. Big picture pricing?

THANKS!

R.
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      01-29-2020, 03:11 PM   #12
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Quote:
Originally Posted by flybigjet View Post
Excellent! I did this on my e46 M3 for road trips-- it was worth the peace of mind.

A few questions:

1. what tire diameter did you go with? Conti's or Kumho?

2. I'm assuming this clears both front and rear? (On my M3, if you got a flat on the rear, you had to swap a front to the rear, then install spare on rear.

3. do you have part numbers for jack, handle, wrench, and foam storage mount?

4. Big picture pricing?

THANKS!

R.
1.

I went with the Kumho 135/70/19 for a couple of reasons

It has a listed rim width range of 3.5-4.5" (versus 3-4" for the Conti) so I thought it might fit the 5" rim a little better

I plan to run taller than stock tires in the near future - 255/35/19 front (26.0") and 275/35/19 rear (26.6")

However, the decision was also based upon my assumption that the Kuhmo would be around 26.4" tall (neither Kumho nor Tire Rack have a diameter listed anywhere that I can find)

As I mentioned above, if the revs per mile listed by Tire Rack are correct the Kumho is probably closer to 26.7" tall

For stock tire size diameters or smaller, I would probably recommend getting the Conti

2.

Since the rim clears the front it should have no problem on the rear, but to be honest I didn't actually check

I only spun the wheel while the car was on the lift to make sure it cleared the front caliper and turned it from side to side to check for any interference (suspension was at full droop)

I have not test driven my car with the spare on to make absolutely certain there are no issues

Because the Kumho tire is actually a little taller than expected, there is a slight chance it could rub the front fender liner (for example, under full compression) but it should be minor if it does

3.

Part Numbers

BMW Emergency Alloy Wheel

36-11-6-775-450

BMW Tool Carrier (Foam Tray)

71-10-6-786-508

BMW Jack

71-12-6-754-372

BMW Jack Crank

71-12-6-756-310

BMW Lug Wrench

71-12-6-788-617

4.

Vincent @ Bimmerzone gave me a pretty good deal since I was willing to be the guinea pig on this

Ballpark I would say at least $500-$600 for everything (more if you want the Conti)

5.

You will need a centering ring to run the 74.0mm hub bore wheel on the M2's 72.56mm hub (which Bimmerzone provides if you buy a kit from them)

I don't know if these are available from BMW although it is possible since the E70 X5M runs a 74.0mm front hub and a 72.56mm rear hub (don't ask me why)

Additional stuff I got from my local dealer (there are much cheaper alternatives)

BMW Luggage Compartment Floor Net

51-47-9-410-838

BMW Luggage Compartment Tie Down Straps

71-10-8-045-545

BMW All Weather Cargo Mat - Basic Line (Black)

51-47-2-357-214

6.

I hope that helps
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      01-30-2020, 04:49 AM   #13
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I will stick with the slime however thank you for sharing the info and detective work.
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      08-01-2022, 10:47 AM   #14
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Does anyone have a picture of the M2C spare in the trunk/boot? Curious if my golf clubs will still fit back there with the spare and the seats up.
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      08-05-2022, 10:57 AM   #15
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Quote:
Originally Posted by papa soey View Post
Does anyone have a picture of the M2C spare in the trunk/boot? Curious if my golf clubs will still fit back there with the spare and the seats up.


im curious too
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      08-07-2022, 11:44 AM   #16
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Quote:
Originally Posted by papa soey View Post
Does anyone have a picture of the M2C spare in the trunk/boot? Curious if my golf clubs will still fit back there with the spare and the seats up.
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