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E34 (1989 - 1995)

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  #1  
Old 10-22-2012, 08:14 PM
Ssuss34 Ssuss34 is offline
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Looking for advice / expirience on wheel spacers - pics inside

Hi Guys, Im wanting to get a better looking stance on my ride by adding wheel spacers.

Just by looking at the pics, what size spacers do you reckon I would need? and would you go thicker spacers on the rear and thinner on the front etc?

I want to avoid any rubbing in the arches.
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  #2  
Old 10-22-2012, 10:29 PM
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Take a ruler and measure..
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  #3  
Old 10-22-2012, 11:45 PM
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OK, IMO spacers will load up wheel bearings and cause early failure. The weight of a road car is projected down through the larger inner bearing to the tyre center (approximately). If you move the tyre center outwards you will get bump steer and other handling nasties. Evenly wider front and rear is fine. Spacers - a can of worms. I suspect a wider genuine wheel is out there, but I am not in a position to offer a constructive suggestion as to which (not having done it). I'm sure someone will know.
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  #4  
Old 10-23-2012, 12:38 AM
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M540FELLA M540FELLA is offline
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Are you rubbing? Rear looks like it needs maybe a 5mm or 10mm, but really it looks good. People run spacers all the time on e34s with no damage done to the bearings. I think that if it was excessive there would be a problem.
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  #5  
Old 10-23-2012, 01:06 AM
Josh429er Josh429er is offline
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I am not a mechanic so I do not know for sure. But I do have experience with suspension geometry. I do not think that the added width will create bump steer. It would take a nasty amount of positive toe to create bump steer. Or dramatic shock absorber change. If anything it would be better for handling, but to small to measure.

My buddy got a E34 with spacers. The stance looks great with more in the back. I'll grab so pics. I'll hafta measure the spacers tho. I know he don't know what they are lol
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  #6  
Old 10-23-2012, 04:25 AM
Ssuss34 Ssuss34 is offline
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Cheers for the input guys, nah I don't rub at the moment. If it rubs with spacers I'll roll the guards.

Yeh some pics of your mates would be helpful, thanks.
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  #7  
Old 10-23-2012, 10:08 AM
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Quote:
Originally Posted by Ssuss37 View Post
Hi Guys, Im wanting to get a better looking stance on my ride by adding wheel spacers.

Just by looking at the pics, what size spacers do you reckon I would need? and would you go thicker spacers on the rear and thinner on the front etc?

I want to avoid any rubbing in the arches.
Hey man. I wish we could be more informative but black wheels makes it difficult to really tell on an already difficult request.

I can do math for you on a napkin but first you should know that the stock wheels are 15x7 et20. That means that out of those 7" the face of the wheel (more accurately the contact surface of the wheel to the hub) is 20mm closer to to the face of the wheel from the dead nuts center of the wheel.

That means that you have 68.9mm of wheel towards the feneder from the hub, and 88.9mm of wheel on the inner well towards the diff with a stock wheel. The wider the wheel you go with the same offset the more wheel you have on both sides. Still with me?

Now we'd need to know what the width and offset your wheels are now, and i can tell you exactly what you'd need.

I'm running 9"wides in the rear with a +26mm offset. I put a 20mm spacer on it so the funcional offset is +6mm. Meaning the hub surface/wheel contact surface is only 6mm away from the dead nuts center. that means i have 108.3mm of wheel towards the fender from the hub, and 120mm of of wheel on the inner well towards the diff. thats a staggering 39.4mm more towards the fender over the stock wheel, diamter and tire size not accounted for.

Other things to consider. How low are you? Tire size?

My tire is stretched so i can get the wheel further out. etc.

I apologize that you didnt get a "5mm for the front, 15mm for the rear" answer. But entire cultures of auto enthusiasm are premised off of these calculations and numbers.

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Last edited by Monsignor; 10-23-2012 at 10:29 AM.
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  #8  
Old 10-23-2012, 06:23 PM
Josh429er Josh429er is offline
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Great illustration, that post alone could be stickied.
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  #9  
Old 10-23-2012, 08:06 PM
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Unless the wheel width is evenly increased there will be an increase in wheel bearing loads and the TENDENCY to bump steer. It all depends on how conservative you are on spacer size. I've seen spacers so deep I was waiting for the funny crunching noise as it left the workshop. Personally, wider - yes; spacers - no.
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  #10  
Old 10-23-2012, 08:32 PM
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I think you're putting way too much emphasis on bearing load. The bearing works marginally harder with spacers. Same thing could happen with aftermarket wheels that have thicker hubs...

I race my 350Z an obviously I have had many a conversation in regards to spacers. Majority of spacers that people use, (98% I'll ball park) are 5-20mm. No bearing issues even with a high performance sports car. The issue rather, is getting spacers with proper hub bores and studs (lug bolts in out case) to have proper thread length in the wheel hub.

I got 20mm hub centric spacers with extended bolts enough to make it though the thicker hub of the E39 wheel, the spacer, and into the wheel hub threads. I have no worries at all about bearing load.
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  #11  
Old 10-23-2012, 08:49 PM
Ssuss34 Ssuss34 is offline
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Quote:
Originally Posted by 95 E34 View Post
Hey man. I wish we could be more informative but black wheels makes it difficult to really tell on an already difficult request.

I can do math for you on a napkin but first you should know that the stock wheels are 15x7 et20. That means that out of those 7" the face of the wheel (more accurately the contact surface of the wheel to the hub) is 20mm closer to to the face of the wheel from the dead nuts center of the wheel.

That means that you have 68.9mm of wheel towards the feneder from the hub, and 88.9mm of wheel on the inner well towards the diff with a stock wheel. The wider the wheel you go with the same offset the more wheel you have on both sides. Still with me?

Now we'd need to know what the width and offset your wheels are now, and i can tell you exactly what you'd need.

I'm running 9"wides in the rear with a +26mm offset. I put a 20mm spacer on it so the funcional offset is +6mm. Meaning the hub surface/wheel contact surface is only 6mm away from the dead nuts center. that means i have 108.3mm of wheel towards the fender from the hub, and 120mm of of wheel on the inner well towards the diff. thats a staggering 39.4mm more towards the fender over the stock wheel, diamter and tire size not accounted for.

Other things to consider. How low are you? Tire size?

My tire is stretched so i can get the wheel further out. etc.

I apologize that you didnt get a "5mm for the front, 15mm for the rear" answer. But entire cultures of auto enthusiasm are premised off of these calculations and numbers.

Thanks Mate, really appreciate the effort you went to. I like to think of myself as pretty handy when it comes to moderate mechanical work (as I have done all mods to my car so far) I have a good eye for being accurate with guestimating and most of the time things work for me first time, although over the years with all my cars, when it comes to wheel offsets I see all these numbers being thrown around and I end up confusing myself. This usually leads to my guestimation strategy and in most cases im just lucky that things fit. This is the first set of spacers I will ever be fitting to any of my cars (as they are illegal in Australia) so it may pay for me to properly search the meaning of offsets etc. But if i do end up confusing myself the guestimate will be 10mm in the front 15mm in the rear. Anyone disagree?
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  #12  
Old 10-23-2012, 09:19 PM
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Take a wheel off and tell me the specs (written on the inside of the spokes) and your tires size. I'll tell you exactly what you need. I have a degree in finance so numbers turn me or something or other...
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  #13  
Old 10-23-2012, 10:30 PM
Josh429er Josh429er is offline
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I'll get you a pic of my buddies tomorrow. The specs by the end of the weekend.
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  #14  
Old 10-24-2012, 09:46 AM
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answers by early next week
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  #15  
Old 10-24-2012, 03:48 PM
Ssuss34 Ssuss34 is offline
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Quote:
Originally Posted by 95 E34 View Post
answers by early next week
I'll get the wheel off today and let you know the specs.
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  #16  
Old 10-24-2012, 05:16 PM
Josh429er Josh429er is offline
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[IMG][/IMG]
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  #17  
Old 10-24-2012, 05:39 PM
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  #18  
Old 10-24-2012, 05:40 PM
Josh429er Josh429er is offline
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Stupid over casty Wisconsin.
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  #19  
Old 10-24-2012, 05:51 PM
Ssuss34 Ssuss34 is offline
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Those rears definately stick out flush more than my rears although im tempted to say my fronts sit about the same. Do you know what size spacers he runs? (not that it really matters yet as he runs different rims to me) 95E34 I will be taking a wheel off an hour from now so will have rim deets up soon.
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Old 10-24-2012, 05:57 PM
Josh429er Josh429er is offline
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  #21  
Old 10-24-2012, 05:58 PM
Josh429er Josh429er is offline
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  #22  
Old 10-24-2012, 05:59 PM
Josh429er Josh429er is offline
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I don't know. I'll know by the weekend.
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  #23  
Old 10-24-2012, 06:04 PM
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I like the hieght on that Josh , looks awesome !

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  #24  
Old 10-24-2012, 08:30 PM
Josh429er Josh429er is offline
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Oh yeah It's cute stance no doubt. Makes me jellous but i got the big motor, so only so much LOL.
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  #25  
Old 10-24-2012, 08:37 PM
Ssuss34 Ssuss34 is offline
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Quote:
Originally Posted by 95 E34 View Post
Take a wheel off and tell me the specs (written on the inside of the spokes) and your tires size. I'll tell you exactly what you need. I have a degree in finance so numbers turn me or something or other...
ok, so I have taken one of my wheels off and looked everywhere. There were no stapmings of anything with ET... Keep in mind these are replica rims. Whats another way of finding the offset?

However I did find the following (See Pics, not sure if it means anything to you)

Also my tire sizes are:
Rear: 235/45ZR17 94Y
Front: 235/45ZR17 97W

Let me know if any of this helps.
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