Welcome to ZRoadster.org - BMW Z1 Z4 Z8 Z3 Forum and Technical Database

If you want to join in with the discussion, and see the areas which are available only to members then sign up now!

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Rear wheel spacers

Discussion in 'Z3 Roadster & Coupé' started by SilverZed, Feb 14, 2012.

  1. SilverZed

    SilverZed Dedicated Member

    Joined:
    Jan 29, 2012
    Messages:
    104
    Likes Received:
    0
    Trophy Points:
    29
    Location:
    Sunderland
    Model of Z:
    2.2
    Looks like the stock alloys on my Zed would look better a little wider apart to fill art those nice flared arches. Does anyone know what size spacers I need? I was thinking 20mm each side..
     

    Attached Files:

  2. swamper

    swamper Zorg Guru (V)
    Supporter M Power

    Joined:
    Dec 4, 2011
    Messages:
    2,593
    Likes Received:
    813
    Trophy Points:
    181
    Location:
    Mossley
    Model of Z:
    z3m
    i used 15mm seemed spot on...but im not sure what off set you have
     
  3. GazHyde

    GazHyde The Gaz Monkey
    Staff Member Administrator Global Moderator British Zeds

    Joined:
    Dec 2, 2011
    Messages:
    15,210
    Likes Received:
    9,349
    Trophy Points:
    226
    Location:
    Newbury, Berkshire
    Model of Z:
    BMW Z4 3.0Si Sport
    It depends on how far you want them to move out. I fitted 15mm spacers on my 18 inch alloys. Had to put the 16's (same style as yours) on for a while over christmas, but couldn't get the spacers off.

    So here is a couple of pictures of a facelift Z3 with the same wheels as yours with 15mm spacers, and it did not move them as much as I thought it would.
     

    Attached Files:

  4. heath

    heath Regular Member

    Joined:
    Dec 22, 2011
    Messages:
    88
    Likes Received:
    0
    Trophy Points:
    19
    Location:
    Burton on Trent
    Model of Z:
    Z3 2.0 individual
    I have 20mm spacers on my 18 inch alloys & it fills the arch out nicely. I worried that 20s would push the wheel out too far but they dont I think looking at it now even 25s would fit ok
     

    Attached Files:

  5. z3cade

    z3cade Zorg Guru (III)
    East Anglian Crew

    Joined:
    Dec 4, 2011
    Messages:
    1,980
    Likes Received:
    315
    Trophy Points:
    137
    Location:
    Peterborough
    Yes go for 20mm
     
  6. g8jka

    g8jka Zorg Guru (III)
    British Zeds

    Joined:
    Dec 5, 2011
    Messages:
    2,109
    Likes Received:
    1,297
    Trophy Points:
    148
    Location:
    Telford, Shropshire
    Model of Z:
    Z3 - 2000 2.8 Roadster
    Haven't got a better picture of the car from behind to show, but same wheels with 15mm spacers on the rear. Pushed them out a lot better but you should get 20mm spacers on easily.

    [​IMG]
     
  7. gookah

    gookah Zorg Guru (IV)
    British Zeds

    Joined:
    Dec 7, 2011
    Messages:
    2,402
    Likes Received:
    1,164
    Trophy Points:
    150
    Location:
    Shropshire
    Model of Z:
    2.8 Z3

    Don't forget though, yours is lowered, so the camber kicks the top of the wheel inwards allowing for wider spacers.
    Remember when we first put on your BBS wheels, when the car was still on the jack they were protruding beyond the wheel arches and as we lowered the jack they went inside them. At first we thought they would be too wide,
    The lower the car, the wider the spacer, or smaller the offset, is allowed.
     
  8. heath

    heath Regular Member

    Joined:
    Dec 22, 2011
    Messages:
    88
    Likes Received:
    0
    Trophy Points:
    19
    Location:
    Burton on Trent
    Model of Z:
    Z3 2.0 individual
    Sorry but this isn't really correct, the maximum size spacer or smaller offset you can have is still the same wether the car is lowered or not, if a spacer is too wide for a standard set up & hits the arches it will still hit the arches if the car is lowered as the outside of the wheel will still follow the same curve as it goes up & down
     
  9. TaffZee

    TaffZee Zorg Guru (V)
    Supporter British Zeds

    Joined:
    Dec 5, 2011
    Messages:
    2,082
    Likes Received:
    1,363
    Trophy Points:
    183
    Location:
    Near Llangollen North Wales
    Model of Z:
    Z4 3.0 SE
    My suspension is standard, just bought a pair of hubcentric 20mm spacers from these people: https://www.dvbcaraudio.co.uk/advanced_ ... el+spacers

    Just keep in mind the 15mm spacers use longer bolts bolted to the original hub, the 20mm Spacers bolt onto the hub first and then you bolt the wheel directly to the spacer.

    Make sure you go for the Hubcentric spacers...

    Best Price I could Find
     
  10. z3cade

    z3cade Zorg Guru (III)
    East Anglian Crew

    Joined:
    Dec 4, 2011
    Messages:
    1,980
    Likes Received:
    315
    Trophy Points:
    137
    Location:
    Peterborough
    I got my 20mm hub centric spacers from eBay and they were just spacers with longer bolts... We're around £45
     
  11. heath

    heath Regular Member

    Joined:
    Dec 22, 2011
    Messages:
    88
    Likes Received:
    0
    Trophy Points:
    19
    Location:
    Burton on Trent
    Model of Z:
    Z3 2.0 individual
    Yes definately get the hubcentric ones.
    You need spacers with
    5 x 120 pcd
    72.6mm centre bore
    Plus what ever thickness spacer you require. Some of the 20mm ones do bolt to the hub then your wheel bolts to them but mine are the ones with the longer bolts. I think mine were around £56 delivered off ebay
     
  12. gookah

    gookah Zorg Guru (IV)
    British Zeds

    Joined:
    Dec 7, 2011
    Messages:
    2,402
    Likes Received:
    1,164
    Trophy Points:
    150
    Location:
    Shropshire
    Model of Z:
    2.8 Z3

    I disagree,.... the wheel camber angle changes as the car is lowered, look at these pics of the same car.

    [​IMG]

    [​IMG]
    how do you suppose the angle of the back wheels has changed? allowing these wheels to be fitted.


    Also on another car
    [​IMG]
    Tyres protrude..

    and same car ...
    [​IMG]
    now they don't


    thats how you fit Z3M offsets to a normal Z3..


    Lowering a car results in negative camber at the rear. Lowered Z3's always make the existing wheels look further inset. so they require spacing out more. or consequently non lowered can not accept smaller offset wheels or as large a spacer
     
  13. Daz3

    Daz3 Zorg Legend

    Joined:
    Dec 8, 2011
    Messages:
    618
    Likes Received:
    167
    Trophy Points:
    75
    Location:
    Spilsby, Lincolnshire
    Model of Z:
    2.8 Roadster
    I'll second that gookah.
     
  14. r37

    r37 Dedicated Member

    Joined:
    Dec 7, 2011
    Messages:
    293
    Likes Received:
    0
    Trophy Points:
    29
    springs by themselves dont to alot to the camber, maybe 1% if your unlucky. I remember the black z3 from .net and im sure he fitted coilovers with camber adjustment.
     
  15. gookah

    gookah Zorg Guru (IV)
    British Zeds

    Joined:
    Dec 7, 2011
    Messages:
    2,402
    Likes Received:
    1,164
    Trophy Points:
    150
    Location:
    Shropshire
    Model of Z:
    2.8 Z3

    see this post..

    linky
     
  16. r37

    r37 Dedicated Member

    Joined:
    Dec 7, 2011
    Messages:
    293
    Likes Received:
    0
    Trophy Points:
    29
    hmm, i still dont grasp why but majority rules.
     
  17. g8jka

    g8jka Zorg Guru (III)
    British Zeds

    Joined:
    Dec 5, 2011
    Messages:
    2,109
    Likes Received:
    1,297
    Trophy Points:
    148
    Location:
    Telford, Shropshire
    Model of Z:
    Z3 - 2000 2.8 Roadster
    When I fitted my 18's to the car we put the back ones on and they stuck out miles from the arch when the car was lifted on the axle stands. There was no way they were going to go under the arch if they were fitted like this and I almost took them off and returned them, but when we lowered the car so that the wheels were on the ground they sat about level with the arch. Now it has been lowered they do sit further in and there is more negative camber to them, before I couldn't get spacers on without them sticking out of the arches, now I could get away with 10mm/12mm ones probably.

    Look at the pictures of mine, not the best to show it but the top picture is when its not lowered and they sit flush even a little out of the arch and the bottom picture shows with the car lowered and them sitting in the arch and with more negative camber.

    [​IMG]

    [​IMG]

    Since lowering the car I have shredded the inside of the tyres on the rear, proving the camber has changed whereas before it was lowered, they wore more evenly.
     
  18. GazHyde

    GazHyde The Gaz Monkey
    Staff Member Administrator Global Moderator British Zeds

    Joined:
    Dec 2, 2011
    Messages:
    15,210
    Likes Received:
    9,349
    Trophy Points:
    226
    Location:
    Newbury, Berkshire
    Model of Z:
    BMW Z4 3.0Si Sport
    The 18's on mine certainly look to have more camber with the spacers on.

    Have no idea why, but it looked \m/ so didn't really care why.

    Just had it in mind it would wipe out the inner edge of the tyres quickly, so would need to get them swapped on the rim at some stage.
     
  19. gookah

    gookah Zorg Guru (IV)
    British Zeds

    Joined:
    Dec 7, 2011
    Messages:
    2,402
    Likes Received:
    1,164
    Trophy Points:
    150
    Location:
    Shropshire
    Model of Z:
    2.8 Z3
    Because they are not true trailing arms as such, those would appear to arc up and down as if the arms were hinged at the rear edge of the sill,

    The Z3 rears act as if they hinge at the differential so the top of the wheels go in and the bottoms come out as you lower it.

    over simplified but best I can describe it.....simples..
     
  20. heath

    heath Regular Member

    Joined:
    Dec 22, 2011
    Messages:
    88
    Likes Received:
    0
    Trophy Points:
    19
    Location:
    Burton on Trent
    Model of Z:
    Z3 2.0 individual
    Yes I get your point & see what your getting at & I agree that you get more camber when the car is lowered & the wheels go in further at the top when sitting on lowered springs but what I was trying to say is that if you fit spacers to the rear on standard suspension & the wheels rub the arches when you drive down the road they will still rub on lowered suspension as you drive down the road. wether the suspension is lowered or standard it still follows the same curve as it goes up & down.