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      12-09-2016, 03:01 PM   #1
copello
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18" wheels on 21" 451 fitted X5

Hi to all of you,
Thinking of switching my current X5d to a new X540e with 21" wheels (451 set up); Can I Keep my whinter wheels that i currently own (18" wheels model 446).
My deeler says there is no problem... But I would rather have your advice !
Thanks !
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      12-09-2016, 03:12 PM   #2
Mexecutioner
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Should be OK, mine came with 18 and switched them for 21.
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      12-09-2016, 03:41 PM   #3
copello
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Thanks I was anxious as my whinters are 8J x 18 255/55 R18H and the 451 are labeled :10Jx20 275/40 R 20 at the front; 11J x 20 315/35 R 20 at the rear
Do you know what the 10J and 11J stand for ?
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      12-09-2016, 04:03 PM   #4
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Works, but you'll need spacers. Source: father had winters from his E70 and was getting them fitted on his 40e, but spacers were required. His are aftermarket reps though, so not sure if that played a role.
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      12-09-2016, 04:13 PM   #5
copello
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Quote:
Originally Posted by P1et View Post
Works, but you'll need spacers. Source: father had winters from his E70 and was getting them fitted on his 40e, but spacers were required. His are aftermarket reps though, so not sure if that played a role.
I thought spacers were necessary to move wheels outwards ? Will I need it because the18" are too thin?
I am eager on keeping those winter wheels which can bare snow chains which I believe is not the case of 21" ...
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      12-09-2016, 06:45 PM   #6
Mexecutioner
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For looks more than anything, but I understand why. I even put spacers on mine when I went from 18 to 21. They are fairly inexpensive, so why not?
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      12-09-2016, 11:58 PM   #7
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Quote:
Originally Posted by copello View Post
Thanks I was anxious as my whinters are 8J x 18 255/55 R18H and the 451 are labeled :10Jx20 275/40 R 20 at the front; 11J x 20 315/35 R 20 at the rear
Do you know what the 10J and 11J stand for ?
10J and 11J are the widths in inches.

In addition to width, you'd also need to know offsets to be able to definitively determine how your current 18s would compare to the new 21s.
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      12-10-2016, 03:59 AM   #8
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And the 20 is the diameter in inches so don't try fitting 21" tyres to 451s
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      12-10-2016, 07:23 AM   #9
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I recently mounted 18" BMW Style 446 wheels on my '16 X5d for winter with no problems. My X5 was delivered with 20" BMW Style 451 wheels and associated fender flares so the 18s look pretty tucked in comparison to the 20s but fit just fine. Don't see why a 40e would be any different. Only reason for spacers would be to get rid of the extreme tucked in look.

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      12-10-2016, 07:38 AM   #10
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Quote:
Originally Posted by Van1 View Post
I recently mounted 18" BMW Style 446 wheels on my '16 X5d for winter with no problems. My X5 was delivered with 20" BMW Style 451 wheels and associated fender flares so the 18s look pretty tucked in comparison to the 20s but fit just fine. Don't see why a 40e would be any different. Only reason for spacers would be to get rid of the extreme tucked in look.

Thanks a lot! That is exactly it!
I was especially curious of the swapping issue as rear tires on 451 are not idemtical to front tires.
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      12-10-2016, 01:19 PM   #11
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I didnt know they made 21" oem 451 wheels...any pics?
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      12-10-2016, 01:38 PM   #12
copello
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Quote:
Originally Posted by F15Fan View Post
I didnt know they made 21" oem 451 wheels...any pics?
No that was my mistake... they are 20"
Sorry about that!
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      12-10-2016, 02:54 PM   #13
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You could do it... but it will look really bad. Just imagine a bulky muscular person on the top but with skinny wimpy legs.
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      12-13-2016, 05:47 PM   #14
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Quote:
Originally Posted by IvanLZ View Post
You could do it... but it will look really bad. Just imagine a bulky muscular person on the top but with skinny wimpy legs.
I see a few of those at the gym and yes, they don't look super great
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