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      11-08-2019, 09:18 AM   #1
buze
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20" 740M -- different tyres front/back?

Something puzzles me, Internet says these wheels are for 275/45R20 -- however, on my car, the rear wheel are 305/40/R20...

How come? Is it just me (unlikely)

Any implication anyone can think of?

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      11-08-2019, 12:58 PM   #2
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In Europe/Belgium you get front 275/45R20 and rear 305/40/R20 for these rims by default.

You can also fit 275/45R20's front and rear (better for winter setup, smaller tyres = better traction)
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      11-08-2019, 03:33 PM   #3
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Do you know if the rear wheels are the same width as the fronts (9") on the Euro setup, or do they need to be wider to accomodate the 305/40/20s?
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      11-08-2019, 03:44 PM   #4
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Quote:
Originally Posted by TXPearl View Post
Do you know if the rear wheels are the same width as the fronts (9") on the Euro setup, or do they need to be wider to accomodate the 305/40/20s?
That's a very good question. From what I heard, it was the same all around, but the 305 are quite a bit wider then 275 so...
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      11-08-2019, 04:20 PM   #5
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Quote:
Originally Posted by TXPearl View Post
Do you know if the rear wheels are the same width as the fronts (9") on the Euro setup, or do they need to be wider to accomodate the 305/40/20s?
For staggered Euro spec - front 275/45/20 and rear 305/40/20, the wheels are front 9.5 and rear 10.5.

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      11-08-2019, 05:27 PM   #6
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Thanks, Auricom.

Too bad. I like the 740M wheels and prefer to keep a higher profile and greater sidewall, but was hoping to be able to put some wider rubber on the rears. Doesn't sound like that'll fit on the US-spec wheels (which are 9" wide on all corners).
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      11-09-2019, 10:26 AM   #7
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Quote:
Originally Posted by TXPearl View Post
Thanks, Auricom.

Too bad. I like the 740M wheels and prefer to keep a higher profile and greater sidewall, but was hoping to be able to put some wider rubber on the rears. Doesn't sound like that'll fit on the US-spec wheels (which are 9" wide on all corners).
Good find also, @Auricom -- I looked quite far and wide and all I could find was that conflicting data where some return 4*275 and some 275+305..

Rather annoyingly, 305's aren't terribly popular so there is little choices for matching tyres...
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      02-03-2020, 07:00 PM   #8
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Quote:
Originally Posted by Auricom View Post
For staggered Euro spec - front 275/45/20 and rear 305/40/20, the wheels are front 9.5 and rear 10.5.

Attachment 2175530
Your pic says fronts are 9” not 9.5” as you state
Which one is it with 740M staggered setup?
Asking now because I want to install the staggered 740M
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      02-04-2020, 01:44 PM   #9
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Quote:
Originally Posted by kmarei View Post
Your pic says fronts are 9” not 9.5” as you state
Which one is it with 740M staggered setup?
Asking now because I want to install the staggered 740M
20x9 front
20x10.5 rear

My dealership sells them for $930 F, $1020 R each.
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      02-04-2020, 02:50 PM   #10
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Quote:
Originally Posted by kmarei View Post
Quote:
Originally Posted by Auricom View Post
For staggered Euro spec - front 275/45/20 and rear 305/40/20, the wheels are front 9.5 and rear 10.5.

Attachment 2175530
Your pic says fronts are 9" not 9.5" as you state
Which one is it with 740M staggered setup?
Asking now because I want to install the staggered 740M
I typed 9.5 and had 9 in my head. It's 9 for Europe and 9.5 square in the USA.
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      02-05-2020, 10:17 AM   #11
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Quote:
Originally Posted by Auricom View Post
I typed 9.5 and had 9 in my head. It's 9 for Europe and 9.5 square in the USA.
according to realoem
they only make the 740M wheel in 2 sizes
9" and 10.5"
so Europe gets 2x 9" fronts and 2x 10.5" rears
in the US we get 4 front wheels basically, so all 4 are 9"

https://g05.bimmerpost.com/forums/sh...1&postcount=18

I haven't seen any 9.5" 740M wheels on any website during my searches, including realoem
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      02-06-2020, 08:45 PM   #12
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I found the staggered 740M wheels
And I found Michelin pilot sport 3 all season in the correct size.
But no company makes all season AND run flat for the staggered torment
And since my new X5 will have 3rd row seats, I can’t have a spare tire
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      02-18-2020, 02:29 AM   #13
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This chart is just for my model but they are all basically the same. Check out the site.
Wheel-size.com
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