Need technical Q/A then you're in the right place
Moderator: martauto
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mrbless248
- E30 Zone Newbie

- Posts: 51
- Joined: Wed Feb 09, 2005 11:00 pm
- Location: N.W London
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Tue Aug 23, 2005 8:27 pm
I'm thinking of buying a set of rims for my E30 Convertible but the only size wheels that they have in the style I want is 17x7.5 4x100. The only problem is that the offset is 45 (and as we all know on an E30 the offset is 15-25! (Barsketts!!!!!)
Anyway, can any of you fine people tell me how I can get them to fit comfortably even if I have to use spacers. And if I do can you tell me the size spacer I'll need (and how you calculated that!)
Many thanks,
An unhappy man.

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karlp
- E30 Zone Regular

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- Location: Southampton
Post
Tue Aug 23, 2005 8:34 pm
Spacer is easy
45 - 15 = 30 or
45 - 25 = 20
there is your answer.
You will need a hub centric spacer and long bolts.
Personally I would not do it because the strain on the bolts.
Karl
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mrbless248
- E30 Zone Newbie

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Tue Aug 23, 2005 8:36 pm
Karl you are a gem mate. So you think that I should'nt bother?
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parksie
- E30 Zone Regular

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- Joined: Sat Feb 19, 2005 11:00 pm
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Tue Aug 23, 2005 8:42 pm
I don't agree with the previous comment !!!!!!!!!
i have 15mm sacers on a 840 with longer bolts, absolutly no problems so i wonder how these guys can make statments without probably never having used spacers and longer bolts, surely the manufacturers have done there sums and sorted the stress issues. !!!!!!!!!!!!!!!!!!!!!!!!!!
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mrbless248
- E30 Zone Newbie

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Tue Aug 23, 2005 8:52 pm
Parksie, how much longer are the new bolts than the originals did you have to use? And in your opinion has it had any negative effects?
Thanks.
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parksie
- E30 Zone Regular

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Tue Aug 23, 2005 9:09 pm
Hi mate
There absolutly No issues.
The bolts are exactly the thickness of your choosen spacer thickness , any longer and you would have problems such as a too long bolt would possibly catch on things such as rear brake shoes or bearings etc
Do not be put off, try wheelsuk, they will supply any type of spacer or bolt or hub centric ring.
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astondg
- E30 Zone Regular

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- Location: Brisbane, Australia
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Wed Aug 24, 2005 12:48 am
Or don't use the ones that require longer bolts.
I have 20mm spacers and about et 45 wheels on my 323i but they are the spacers that bolt to the hub with the normal bolts and then have 4 studs that stick out for the wheel to fit on. The spacer really just becomes part of the hub and the studs make it easier to put the wheel on than the normal bolts.
My wheels fit like they were made for the car and I have had no problems after a year of motorsport, track days and normal road driving. Just make sure you check that the spacers are done up as well as the wheels every now and then, although mine have never been loose.
Aston
BMW E30 323i with some stuff
1:05.17 @ Queensland Raceway Sprint track
1:10.09 @ Queensland Raceway Clubman track
1:21.67 @ Morgan Park Raceway
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mrbless248
- E30 Zone Newbie

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Wed Aug 24, 2005 8:05 am
have you got a pick of your spacers mate? And where did you buy them from?
Cheers.
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Turbo-Brown
- Boost Junkie
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Wed Aug 24, 2005 8:07 am
Longer bolts shouldn't be subject to any greater loads than shorter ones. The bolts are only in tension. The length doens't affect the tension.
The wheel is driven by the friction between the mating face and the hub (or mating face of the disc/drum in most cases). It is
NOT driven by the studs or bolts!
The proper offset (according to my hand book anyway) is 35mm. You can get 7J17 et35 rims on without spacers but they're bloomin close to the strut so an extra 16.35 mm closer would definately need spacers as said above

325i Twin Turbo (until 10am 01/12/07

)
www.air-in.co.uk free M20
exhaust and inlet flange
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astondg
- E30 Zone Regular

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- Location: Brisbane, Australia
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Wed Aug 24, 2005 10:31 am
mrbless248 wrote:have you got a pick of your spacers mate? And where did you buy them from?
Cheers.
Me?
I don't have a picture of mine but they are very similar to this, only 4 stud and not pink:
http://www.rockcrawler.com/features/new ... pacers.jpg
I am in Australia so this might not be helpful but I got them from a guy at a tyre store, a Bob Jane T-Mart store at Chermside in Brisbane.
Aston
BMW E30 323i with some stuff
1:05.17 @ Queensland Raceway Sprint track
1:10.09 @ Queensland Raceway Clubman track
1:21.67 @ Morgan Park Raceway
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mrbless248
- E30 Zone Newbie

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- Joined: Wed Feb 09, 2005 11:00 pm
- Location: N.W London
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Wed Aug 24, 2005 10:39 am
Thanks for the pic, at least I know what I'm looking for!
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Simon13
- The longest resto in the world !
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Wed Aug 24, 2005 2:15 pm
if u get get pucker spacers with just 4x100 in them (H&R do these i think) and not multi fit wrongess with the correct thength bolt, go for it and enjoy!