5 stud adaptors do work!!! 4x100 to 5x120 pics up!!!

[gareth]

i did calculate it, and posted this up on this thread ages ago hence the questions as to how it works.

did you get any pics before you fitted them?
does it actually have a 4th bolt in there?
how is that insert actually retained?

it looks to me like the insert is screwed abnd locked into place and maybe uses a simple pin instead of a bolt on the 4x100 PCD? if so, that's horiffic

[Dezzy]

yeah they do. I have got a set in the garage I'm not using:

If that's 4x100 too 5x120 then THATS how to do it.

[billgatese30]

Yep, thats 4x100 to 5x120 and the way that I have thought about doing it in the past. Well, at least without keeping stock offset.

[Baz666]

what presurer will these`s adaptors put on the bearings tho ??

[Dezzy]

Not alot of problem really as they are light weight and secured to the hub.
I have 10mm spacers on the chromie just to make my 15" bbs's fill the arches so ofset should really be a problem unless your going with massive wheels

[Baz666]

yeah i have 5mm on the front of mine for the 9j borbets to clear my front struts,

so the real question is: which way to go full on 5 stud convertion or adaptors ??

[Rav335uk]

You can go with adaptors, get the right size to offset the ET of the Wheel you put on.

[Baz666]

after seing your wheels Rav i`v scaned the internet for wheels found a few sets, but will have to look into this further.

[BMJG]

i have a set of style 5's of a E39 would love to fit bot as there 5 stud and low offset have no choice but do hub change

[Dezzy]

There is a company near me who machine wheels for this very reason. My mate got 10mm machine off the rear of the wheel to suit the spacer they also made for him. The only restricting factor was the wide of the hub for strength.

[harry_p]

BMW wheels aren't that thick to start with, I wouldn't want to take more than a couple of mm off a set of style 5s

however, the backs are solid so you could in theory get a second set of holes drilled at say 5x100 mm pcd and use some cheaper 15mm 4x100 to 5 x100 adapters.

You can get high offset e36/46 fitment style 5s which would work with 20mm adapters, unfortunately they don't have the deep dish which makes the 5 series ones so sexy.

[Baz666]

unfortunately they don't have the deep dish which makes the 5 series ones so sexy.

second that

[BMJG]

Thats why i have the E39 style 5's nice deep dish still on my E39 at mo till i find something to replace then will get them all polished and then fit on the sport. they do look

[Baz666]

get a picture up BMJG

[kam325itouring]

i did calculate it, and posted this up on this thread ages ago hence the questions as to how it works.

did you get any pics before you fitted them?
does it actually have a 4th bolt in there?
how is that insert actually retained?

it looks to me like the insert is screwed abnd locked into place and maybe uses a simple pin instead of a bolt on the 4x100 PCD? if so, that's horiffic

the instert is srewed in and locked it screws in about 6 turns which is plenty. As i said before these adaptors have been carefully thought through.

[gareth]

what about the 4th bolt though?

[kam325itouring]

the 4th bolt is the insert which screws in. and which is the 5th bolt on the 5x120.

[gareth]

really?
I don't like that!

how can the insert (bolt 4) be torqued up properly to provide the necessary clamping loads to the adaptor, yet maintain the angular alignment for the hole in the top of it? is it shimmed underneath?

to provide a safe and strong fixing, an adaptor needs to be fixed to the hub firmly and then the wheel fixed to the adaptor firmly, not one of the adaptor fixings. on your setup the insert will pull away from the hub when the wheel is fitted, thus not securing the adaptor. it will all bolt up hard but the force paths through that adaptor are all wrong and could lead to fatigue failures from the cyclic and uneven loading it will recieve when you drive.

chances are they'll be fine but keep a VERY close eye on them, including the 4x100 fixings as if it starts to fatigue, they will loosen.

I design loadcells at work, which means i spend a lot of time evaluating load paths and stress distribution through materials and mechanical assemblies and i can see that setup is all wrong. the two part adaptor is vastly superior from an engineering viewpoint, at the cost of it being thicker.

oh, you may want to put some anti-size compound around the shoulder of the insert, the adaptors don't look like they've been anodised and any moisture in there will cause corrosion and lock the inserts in a treat.

[kam325itouring]

cool thanks for the advise, but concept wheels use the same design, tried and tested for years and snooka on the zone is using them on his car for a while.

[DanThe]

I agree with Gareth, looks very dodgy, would be interesting to see them on a track car!

Jazzmans 2 piece adaptor seems to me the only way to convert using spacers, the proper way to do it is by using different hubs.

This is a 5x120 disc drilled to fit 4x100 hubs, as you can see its impossible to miss all the holes

[keri-WMS]

The whole 4 > 5 stud subject is getting me really tempted to apply some serious WMS engineering and a total re-think....

Re: that first one, the steel insert IS the bolt, so the whole thing turns - is that right? If so how do you make sure the new hole in the top of it is in the right place without leaving it too loose or too tight?

[JazzMan]

I suppose the ultimate solution would be 5 stud hubs ala 300mm.de:



http://www.300mm.de/325mm/325mm.htm

I assume that these are custom parts they have made as I'm not sure any stock bearings fit without modification on the front.

For the rear any Z3 or Compact trailing arms would suit.

[keri-WMS]

[harry_p]

Surely there's a Market for 5 stud front hubs which will use an off the shelf bearing, they don't look that complex, and people are happy to pay 2-300 for a set of adapters.

Rears are already easier with compact rear arms which will give a slightly wider rear track, or I think e30 m3 rear hubs use the same driveshafts and bearings so just need the hub flange. Don't know how much they are from BMW, bur again if teres demand I can't see them being that challenging to copy.

[DanThe]

I suppose the ultimate solution would be 5 stud hubs ala 300mm.de:



http://www.300mm.de/325mm/325mm.htm

I assume that these are custom parts they have made as I'm not sure any stock bearings fit without modification on the front.

For the rear any Z3 or Compact trailing arms would suit.

They just look like standard 5 stud hubs with adaptors in the centre

[keri-WMS]

Surely there's a Market for 5 stud front hubs which will use an off the shelf bearing, they don't look that complex, and people are happy to pay 2-300 for a set of adapters.

My thoughts exactly. But what EXACTLY would people want?

More to the point, what wheels are people wanting to run? Most people would be after the cheap 16" 5 series ones I would have thought?

The hub's offset should be correct to allow the most common 5 stud wheels to fit with no spacers, but even then the 5 stud brakes won't be a bolt up fit so that needs resolving (shouldn't be too hard! )

[Jhonno]

To be fair, the 5 lug 'obsession' is a bit ridiculous..

[Dezzy]

To be fair, the 5 lug 'obsession' is a bit ridiculous..

says the guy with m3 set up.

I have often thought og getting my mate to make me a set of hubs at work. I wish I had done them when I was still on the tools.
Just make a complete copy of E30 hubs with 5x120 and drill the disks or use other BMW discs?

Opens up loads of wheels hmmm. I think it could be worth a group buy?

[JazzMan]

indeed the choice of wheels is much bigger with 5 stud, I'm tempted to get some Image wheels made up for the Sportster that way the wheels can be completely custom spec.

[Jhonno]

To be fair, the 5 lug 'obsession' is a bit ridiculous..

says the guy with m3 set up.

I have often thought og getting my mate to make me a set of hubs at work. I wish I had done them when I was still on the tools.
Just make a complete copy of E30 hubs with 5x120 and drill the disks or use other BMW discs?

Opens up loads of wheels hmmm. I think it could be worth a group buy?

I have had mine for about 5yrs now.. I never fitted it to fit a set of wheels either.

[Dezzy]

If you don't want them send it to me. I would fit them with 16" M3 bbs

[DanThe]

5 stud gives a bigger choice of wheels, but IMO only 1% of those wheels suit an E30 anyway.
The only reason I would go 5 stud is if I wanted different suspension and so would be forced to use it

[Jhonno]

If you don't want them send it to me. I would fit them with 16" M3 bbs

Done the 16" BBS'.. Not big enough for my brakes now..

Never said I didn't want it either, I said I never fitted it to fit a set of 5 lug wheels.. I do question my sanity a little though when I realise my chassis setup costs more than a clean Sport..

[Jhonno]

5 stud gives a bigger choice of wheels, but IMO only 1% of those wheels suit an E30 anyway.
The only reason I would go 5 stud is if I wanted different suspension and so would be forced to use it

Agreed!

There are more than enough suspension options available for non M setups..

So anyone want a complete standard E30 M3 setup?

[Dezzy]

I know mate not being serious. I would love 16 bbs on my chromie, not for any other reason than I fooking love them.