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[Trainman]

I have a stock 335i with sport package and just put on 20 inch rims and tires and have had no trouble with rubbing and they JUST fit inside the wheel wells.They handle and ride much better than the run flats,now if i can get them to tweek the balance I will be happy as hell with the set up.The actual sizes are as follows:

20x10 Beyern medium offset rear
20x8.5 " " " front
225/35zr-20 90w
255/30r-20 92w Toyo Proxes
Im sorry, i had already posted this info but not on this thread.And I dont now what mediu offset is for sure but will find out saturday when I go back in to have the balance tweeked.

[JOSG328I]

Trainman -

If anything you are probably running the ET30mm all the way around I am runnning the same set up and they sit the same as mine.

[shragon]

Front: 18x8.0, 34mm offset, 235/40-18 tires
Rear: 18x8.5, 37mm offset (w/12mm spacer, which in turn makes the offset 25mm), 265/35-18 tires
Suspension: h&r sport springs, stock zsp shocks

[Trainman]

I am still having shudder problems with my tires and rims,fronts are good but the back start shuddering a about 80mph, I have taken them back and had rebalance done but to no avail. Any info I can go armed with on my next visit would be appreciated.Dont know if its the tires or rims or both and I am obviously not gong to be able to live with the problem,completely happy with the set up otherwise. I guess I will make them drive it and feel it in person,up to now they wont even pull the car in,they have me do it! Ill take a sheet or something to put on the seats.

[Lemans_Blue_M]

Originally Posted by Trainman

I am still having shudder problems with my tires and rims,fronts are good but the back start shuddering a about 80mph, I have taken them back and had rebalance done but to no avail. Any info I can go armed with on my next visit would be appreciated.Dont know if its the tires or rims or both and I am obviously not gong to be able to live with the problem,completely happy with the set up otherwise. I guess I will make them drive it and feel it in person,up to now they wont even pull the car in,they have me do it! Ill take a sheet or something to put on the seats.

I see that you are in need of some technical assistance...

Allow me to offer you some help on this issue.

I have some 'experience' in this area that will help you solve your vibration issues. I feel your pain my friend. It drives me crazy if I can feel anything like that while driving. It's a very unnerving to say the least. (especially at high speeds)

I understand your situation, and I already have a strong suspicion as to the root cause of your vibration problem.

But I want to cover all the bases first...

Let's go over the basics first, so we don't WASTE TIME going over information that is already known...

a) You have 20" Beyern 25 spoke CAST wheels
b) You have 20" Toyo Proxes Tires (225/35 Front, 255/30 Rear)
c) You had a major vibration problem after installation, but this subsided somewhat after you had the wheels rebalanced again. (this didn't solve the problem and the vibration is still there)
d) You feel that your REAR wheels are out of balance and are contributing to your vibration problem
e) You feel this vibration at 55-60 MPH and it gets a lot worse at around 80 MPH
f) Your wheels rub the fenders under certain conditions

This is the crucial information that I need from you at this point:

#1) What is the REAR wheel offset? (I need the exact number, no guessing)
#2) What is the FRONT wheel offset? (again, no guessing)
#3) I need to know the shop where your wheels were originally balanced? (name and location)
#4) I need to know the shop that did the 2nd rebalance job? (name and location)
#5) I need you to tell me whether the BEYERN wheels were bought NEW from a dealer, or USED from another member or enthusiast? (same goes for the tires)
#6 Tell me the EXACT torque specs that were used to tighten the wheels onto the car?

I can promise you that this problem can and will be solved if you trust my directions.

[Trainman]

Wow, you are like an angel from above. I will have to get you the info,all my paper work said was "medium offset". I bought the tires and rims new from les Schwab in Martel California.209-257-0690. They did the original and the rebalance. I just talked to Andy and he provided me with this info: rims were torqued in the air at 88 ft lbs.
Front offset is 5.5"
Rear offset is 6.2"
I hope you can come up with a answer as I would love to keep these wheels and tires if I can,but not if it means living with what I have now,needless to say. Thanks for your concern and time. I hope I got you all he info you need.

[Lemans_Blue_M]

Originally Posted by Trainman

Wow, you are like an angel from above. I will have to get you the info,all my paper work said was "medium offset". I bought the tires and rims new from les Schwab in Martel California.209-257-0690. They did the original and the re-balance. I just talked to Andy and he provided me with this info: rims were torqued in the air at 88 ft lbs.
Front offset is 5.5"
Rear offset is 6.2"
I hope you can come up with a answer as I would love to keep these wheels and tires if I can,but not if it means living with what I have now,needless to say. Thanks for your concern and time. I hope I got you all he info you need.

Ahh...Les Schwab. They are the wheel guru's...lol

Well at least they got the correct BMW wheel bolt torque value right. (88ft./lbs.)

As for the offsets...

...it seems that your tire/wheel guy doesn't know how to read wheel offsets. At all...

That is not a good sign...

Wheels don't have 3", 4", 5.5", or 6.2" offsets. They are measured in mm from the centerpoint of the wheels width to the back of the center hub that bolts to the car. On a typical BMW car you typically see wheel offsets listed as +30,+35,+43, +47, etc. in mm depending on the wheel width itself.

Examples of actual wheel offset values:

+30mm offset = 1.18 inches

+47mm = 1.85 inches

As you can see, those numbers are no where near your guy's numbers. Did he measure from the back of the center hub to the back edge of the wheel? Did he measure from the back of the spokes near the outer barrel to the edge? I have no idea how he measured those front and rear wheels to get those crazy numbers. That's why you need a uniform way to measure wheel offsets for every manufacturer. (universal method)

I really need those exact offsets to help you exclude certain things that may be causing your vibration problem. TSW manufactures a number of different wheel offsets per platform. It's very important to find out the exact offset wheel you have on your car. It can answer of number of questions for you.

The fact that your wheel/tire dealer lists the offset as 'medium' is completely worthless to be perfectly honest. Seriously, what the hell does that mean. That's a bunch of sales mumbo jumbo. There is no way to isolate a problem without clear, concise and accurate information. Close doesn't count. Tell your dealer to get the right offsets asap. It's listed in mm somewhere on there spec sheets, it can't be that hard to find. For Christ's sake...they sell these wheels for a living right? And you're telling me they don't know what the correct offsets are, or even how to figure out how to decipher them correctly. That's pretty scary.

5.5" offset...LOL.

It really makes me wonder what else they don't know. I'm beginning to understand where this problem may have originated...

Get the correct offsets and post them up tomorrow.

[Trainman]

I didnt think that sounded right but I am not very knowledgable about these things, Im supposed to be able to rely on a professional.I think he looked it up on his computer but who know's.I am starting to suspect i made a big mistake trusting these guys,even though they are really cool .Yes, I will stop there on my way home from Sac in the morning,have to get my I-Drive reprogrammed. I hope I can salvage what put out for these rims and tires!!
I'll post the numbers as soon as i get home, thanks again.

[Trainman]

According to Chad as LS the offsets are as follows:
Front +20mm with a 5.5" Back space,rear is also +20mm with a 6.5 back space.Please let me know if I can provide anymore info.

[Lemans_Blue_M]

Originally Posted by Trainman

According to Chad as LS the offsets are as follows:
Front +20mm with a 5.5" Back space,rear is also +20mm with a 6.5 back space.Please let me know if I can provide anymore info.

I have all the internal part numbers for the 20" Beyern Wheels on the market. Please look at your receipt or call and get that information for me.

The Beyern wheel part number will look something like this:

2085BYT205120S74

I need the front AND rear part numbers.

[montreal_bimmer]

Originally Posted by Trainman

According to Chad as LS the offsets are as follows:
Front +20mm with a 5.5" Back space,rear is also +20mm with a 6.5 back space.Please let me know if I can provide anymore info.

those offsets are too aggressive for the E90, especially the front

[JOSG328I]

If anything I think you may have the 20x10 Multi with the 25mm in the rear.

That probably could explain the 255/30 rear tire on the wheel cause that is a tiny tire for a 10" wide wheel. Also if that is the case that 25mm I think has a 74mm centerbore which was for the E39 5 series.

That could be the reason for the rear vibration and a simple hubring should do the trick. But yes of course exact information would be needed.

[Trainman]

part #'s: rear 20i20h5c4
front 28i20h5c4
747256 hr74-7256 hub ring set

[Lemans_Blue_M]

Originally Posted by Trainman

part #'s: rear 20i20h5c4
front 28i20h5c4
747256 hr74-7256 hub ring set

May I ask where you got those numbers?

They don't match any BEYERN multi-spoke wheel part number I have. Is this number off your receipt or from Les Schwab directly? That maybe an internal store part number. Any chance of getting the actual Beyern part number directly off the boxes the wheels came in?

I have to say, none of the information that they have given you makes any sense at all. The numbers are not adding up. I'm still not sure what wheel is actually on your car. The centering rings are a dead giveaway. It's seems as though you have 5-series 74mm bore wheels, but the 5-series BMW offsets don't work on a 335i. Hmm... There are 8 different 20" Beyern multi-spoke wheel models. This is confusing as hell.

Please post up any additional info and a few closeup pics along the side of the car. These wheels are clearly wrong, but HOW wrong is still the key question.

[zobeon]

Wheels: Kinesis K18R
Front: 8,5x19 +38 on 235/35 pirelli pzero nero
Back: 10x19 +32 on 265/30 pirelli pzero nero
Suspension: Stock with Eibach Pro Kit

[6MTFTMFW]

Originally Posted by zobeon

Wheels: Kinesis K18R
Front: 8,5x19 +38 on 235/35 pirelli pzero nero
Back: 10x19 +32 on 265/30 pirelli pzero nero
Suspension: Stock with Eibach Pro Kit

These are possibly the best looking wheels I have seen on e9x. Very very nice.

[montreal_bimmer]

Originally Posted by zobeon

Wheels: Kinesis K18R
Front: 8,5x19 +38 on 235/35 pirelli pzero nero
Back: 10x19 +32 on 265/30 pirelli pzero nero
Suspension: Stock with Eibach Pro Kit

car looks great.... and perfect info.... you wrote everything anyone needs to know...

fellow members.... be like zobeon when posting in this thread

[Trainman]

heres the info off the invoice,I doubt the boxes are still around but I can check when I get back in town on Thursday,this is all getting to seem very fishy. 5 series wheels? That would explain alt,yes? anyway,heres the 411

Qty Product code Product description
2 03366644 20I20H5C4 20x10 5-120 Beyern Multi Chrome medium offset
2 03366640 28I20H5C4 20 x 8.5 " "




Does that help at all? If not I will stop by there Thursday and get the actual Beyern part #'s, my camera is not available right now and I doubt my camera phone would do much justice.
I cant thank you guys enough for jumping in and helping me out here, I am in awe of your knowledge and your concern.

[Lemans_Blue_M]

Originally Posted by Trainman

heres the info off the invoice,I doubt the boxes are still around but I can check when I get back in town on Thursday,this is all getting to seem very fishy. 5 series wheels? That would explain alt,yes? anyway,heres the 411

Qty Product code Product description
2 03366644 20I20H5C4 20x10 5-120 Beyern Multi Chrome medium offset
2 03366640 28I20H5C4 20 x 8.5 " "




Does that help at all? If not I will stop by there Thursday and get the actual Beyern part #'s, my camera is not available right now and I doubt my camera phone would do much justice.
I cant thank you guys enough for jumping in and helping me out here, I am in awe of your knowledge and your concern.

I suspect they are giving you internally generated Beyern wheel SKU part numbers from their own inventory system. Those are not BEYERN manufacturing part numbers. I have all the actual manufacturing numbers for every model/size/finish they make.

Here are the 8 BEYERN part numbers that apply to your wheel model and size:

1) 2085BYT405120C72 BEYERN MULTI 20x8.5 5/120 ET40 CB72 CHROME
2) 2085BYT305120C72 BEYERN MULTI 20x8.5 5/120 ET30 CB72 CHROME
3) 2085BYT205120C74 BEYERN MULTI 20x8.5 5/120 ET20 CB74 CHROME
4) 2085BYT205120C72 BEYERN MULTI 20x8.5 5/120 ET20 CB72 CHROME
5) 2010BYT405120C72 BEYERN MULTI 20x10 5/120 ET40 CB72 CHROME
6) 2010BYT305120C72 BEYERN MULTI 20x10 5/120 ET30 CB72 CHROME
7) 2010BYT255120C74 BEYERN MULTI 20x10 5/120 ET25 CB74 CHROME
8) 2010BYT205120C72 BEYERN MULTI 20x10 5/120 ET20 CB72 CHROME

according to Les Schwab, they are contending that you have purchased number 3 & 7. But the backspacing numbers they stated tend to dismiss those choices. With a backspacing calculator using the numbers they provided you (5.5" & 6.2"), it seems you have number 2 & 6. That's IF they measured correctly using the proper method.

The backspacing number breakdown:

Les Schwab is telling you that they measured 5.5" front and 6.2" of backspacing (they said offset, but whatever) on the wheels they sold you.

OK let's explore that for a second...

IF that's true, then they have contradicted themselves by claiming they sold you +20 offset wheels front and rear. A +20 offset F&R won't even fit your car properly, but let's put that aside for a minute.

If your front 8.5" wide wheel has 5.5" of backspacing, and this was measured accurately, that means you MUST have a +30 offset front wheel:

8.5" wide wheel = 4.25" centerpoint

4.25" centerpoint + 20mm offset (0.787") = 5.037 inches of backspacing

but...

4.25" centerpoint + 30mm offset (1.18") = 5.43 inches of backspacing


That is only 0.07 inches away from the 5.5" number they told you. Correct?

That makes a hell of a lot more sense, but again, it all hinges on the person making those measurements in the first place. That's why the actual part numbers are so important. It removes all the speculation about these numbers.

The rear backspacing number only increases my suspicions about them giving you faulty or contradicting information. The rear backspacing number you were given tells the story. By their account, you can't have a +20 offset wheel.

10" wide rear wheel = 5" centerpoint

5" centerpoint + 20mm offset (0.787") = 5.79 inches of backspacing

but...

5" centerpoint + 30mm offset (1.18") = 6.18 inches of backspacing

That is only 0.02 of an inch away from the 6.2" backspacing number they gave you. Correct?

The rear wheels MUST be +30mm offset, IF the measurements they gave you were correct.

At this point, you have to figure out what information was incorrect. The first part, or the second part. They can't both be true. Either the backspacing numbers are wrong, or the offset information they told you is wrong. One or the other. The addition of hubcentric rings to your wheels is throwing me off. Why would you need those unless your wheels are 74mm hub bore? (5-series cars)

This is so screwed up...

[remmib]

If there's 3 different offset 20, 30 and 40, and he got the "medium" offset then that could mean offset 30mm. Just a thought.

[Lemans_Blue_M]

Originally Posted by remmib

If there's 3 different offset 20, 30 and 40, and he got the "medium" offset then that could mean offset 30mm. Just a thought.

I agree that is the most likely scenario, but they actually told him he had a +20mm offset F&R. They also gave him hubcentric rings that ONLY apply to 74mm hub bore wheels that fit on 5-series cars with a +20 & +25 mm offset F&R. So all this contradictory information is a mess...

[Luki]

BMW E91
Wheels: BBS CK
Front: 8,5x18, ET 35 with 225/20/18 Nokian NRY
Back: 8,5x18, ET 35 with 255/35/18 Nokian NRY
Suspension: M-sport stock