Signature Public Announcement - MP4S + KW HAS Fitment

[Signature Wheel BMW]

As a member of the wheel community, we feel that it is important for us to share our findings about the wider MP4S and KW HAS fitment issue.

(Only impacts older KW HAS PN 253200AN, disregard if you have PN 253200ANU) *Thanks Justin from Auto Talent

MP4S is about 3-4 mm wider per side compared to the MPSS tires (Tire Rack's tire specs doesn't disclose this). KW HAS has helper springs, which the spring perch sits lower than any other HAS kit on the market. With that in mind, the front fitment can be very challenging.

Below is a photo of 20x9.5 ET20 with 265/30/20 MP4S tires (front). MPSS had no issues with this fitment in the past on KW HAS, but MP4S being wider hits the spring perch. At the minimum, we recommend 9.5 ET17 to clear 265 MP4S for KW HAS.



Our other customer bought 20x9.5 ET18 hoping it will clear MP4S with KW HAS, which it did but with only 1.5mm to spare. Being so close the spring perch, he added 3mm spacers in front just to be safe.





We hope you find this helpful. Feel free to ask any wheels fitment questions.


*per Justin from AutoTalent: "KW has created a new HAS kit. The one installed on the Frozen Black car in the pictures is KW HAS 253200AN, the revised one is 253200ANU. The new "ANU" part number has a smaller perch, which does not have clearance issues."

[IK0122]

Correct me if I'm wrong but this would be the case for any wheels size from 18in - 20in if you want to run 265s in the front?

[M4_GTS]

This is not something new, it's been brought up a few times already about the tight clearance with the HAS kit.
http://f80.bimmerpost.com/forums/sho...=HAS+clearance

[Signature Wheel BMW]

Originally Posted by IK0122

Correct me if I'm wrong but this would be the case for any wheels size from 18in - 20in if you want to run 265s in the front?

Wheel diameter doesn't impact offset, just width. So 19x9.5 ET20 265/35/19 will have the same clearance as 20x9.5 ET20 265/30/20.

[Signature Wheel BMW]

Originally Posted by M4_GTS

This is not something new, it's been brought up a few times already about the tight clearance with the HAS kit.
http://f80.bimmerpost.com/forums/sho...=HAS+clearance

Somewhere in the same line, but MP4S weren't even available when Ashley started that thread in 2015. Those who looked at that thread would go with 19x9.5 ET20 or 20x9.5 ET20 front to clear KW HAS. Now with MP4S, 9.5 ET20 won't work is the point.

The purpose of this thread is educating everyone that MP4S is even WIDER than MPSS, so 9.5 ET17 minimum is needed to clear 265 MP4S tires on KW HAS.

[M4_GTS]

got these specs from tirerack.

MPSS 265/30/20 star spec tread width 8.9"
MPSS 265/30/20 regular spec tread width 10"

MP4S 265/30/20 regular spec tread width 9.4"

[Signature Wheel BMW]

Originally Posted by M4_GTS

got these specs from tirerack.

MPSS 265/30/20 star spec tread width 8.9"
MPSS 265/30/20 regular spec tread width 10"

MP4S 265/30/20 regular spec tread width 9.4"

Tire Tread isn't what hitting the spring perch, it's the sidewall (section width). MP4S sidewall is wider than MPSS, this is direct feedback from a few of our customers.

[mm767cap]

OH MAN. Thanks for putting this out here. I've got Vorsteinner VFF103's with MP4S and I'm scheduled to drop TOMORROW on M Performance suspension, which I understand is basically the KW HAS system. As far as I can tell, these wheels are ET22. So I would need about a 5mm spacer to clear I'm guessing. Not at all sure that will not cause an issue with the fenders at that point. They already look pretty flush without any spacers.

Now I'm stressed.....

[Signature Wheel BMW]

Originally Posted by mm767cap

OH MAN. Thanks for putting this out here. I've got Vorsteinner VFF103's with MP4S and I'm scheduled to drop TOMORROW on M Performance suspension, which I understand is basically the KW HAS system. As far as I can tell, these wheels are ET22. So I would need about a 5mm spacer to clear I'm guessing. Not at all sure that will not cause an issue with the fenders at that point. They already look pretty flush without any spacers.

Now I'm stressed.....

MP HAS doesn't have a helper springs like the KW HAS, the spring perch sits above the tire sidewalls so you should be fine. Please report back with photos of your MP HAS clearance so the community can see as proof.

[CanAutM3]

Originally Posted by Signature Wheel BMW

MP HAS doesn't have a helper springs like the KW HAS, the spring perch sits above the tire so you should be fine.

That is good info

[mm767cap]

Originally Posted by Signature Wheel BMW

MP HAS doesn't have a helper springs like the KW HAS, the spring perch sits above the tire so you should be fine. Please report back with photos of your MP HAS clearance so the community can see as proof.

If you were local, I would kiss you right now. In a friendly way of course. I'll report back for sure! Thanks for the great info all the way around

[Ferg]

Please let me know about his as well as I have MP HAS being installed soon with MP4S in 265/30/20.

[mm767cap]

Originally Posted by Ferg

Please let me know about his as well as I have MP HAS being installed soon with MP4S in 265/30/20.

Will definitely post back here when I get the car back. Should be end of the week as they are doing other warranty work.

[Justin.AutoTalent]

For what it's worth, KW has created a new HAS kit. The one installed on the Frozen Black car in the pictures is KW HAS 253200AN, the revised one is 253200ANU. The new "ANU" part number has a smaller perch, which does not have clearance issues.

[Signature Wheel BMW]

Originally Posted by Justin.AutoTalent

For what it's worth, KW has created a new HAS kit. The one installed on the Frozen Black car in the pictures is KW HAS 253200AN, the revised one is 253200ANU. The new "ANU" part number has a smaller perch, which does not have clearance issues.

This is good info, thanks so much Justin. I've updated the original post.

[Justin.AutoTalent]

Originally Posted by Signature Wheel BMW

This is good info, thanks so much Justin. I've updated the original post.

No problem Jimmy

[LOW4LYF]

Originally Posted by Justin.AutoTalent

For what it's worth, KW has created a new HAS kit. The one installed on the Frozen Black car in the pictures is KW HAS 253200AN, the revised one is 253200ANU. The new "ANU" part number has a smaller perch, which does not have clearance issues.

Any chance to update just the spring without getting a whole new set?

Thanks

[Justin.AutoTalent]

Originally Posted by Figurka

Any chance to update just the spring without getting a whole new set?

Thanks

The perches are available separately.

I'll post a few pictures of the different parts Monday

[LOW4LYF]

Originally Posted by Justin.AutoTalent

The perches are available separately.

I'll post a few pictures of the different parts Monday

Thanks a lot!

[clutchdj]

Plz post up new Spring pertch info.
I would like to update mine as well.

[Justin.AutoTalent]

Originally Posted by Figurka

Thanks a lot!

Originally Posted by clutchdj

Plz post up new Spring pertch info.
I would like to update mine as well.

The perch and adjustment ring is noticeably smaller compared to the AN part number.

OLD: AN Part Number

(Photo provided by Tag)



NEW: ANU Part Number

DSC04484 by Justin Shih, on Flickr

DSC04483 by Justin Shih, on Flickr

DSC04481 by Justin Shih, on Flickr

DSC04480 by Justin Shih, on Flickr

[KRUZNM3]

thanks for the info guys!