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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 04-01-2013, 11:25 AM   #1
Chrsb5
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Sportline CS16 wheels.Help Needed: Vibration/wobble issue I canít seem to figure out.

Hopefully the community can help shed some light on this weird shimmy/wobble vibration issue Iíve been experiencing. The wheels are Sportline CS 16 in 18x8.5 et35 wrapped in Kuhmo Escta 4x 235/45/18. I purchased the wheels from Modbargains.com and the tires from Tirerack less than a year ago and things have never been right. Around 60mph I get a pretty severe wobble/vibration, itís to the point where the car is undrivable on the highway. The factory 17 inch wheels with Dunlop Wintersports are smooth as can be at speed, no problems at all.

Iíve had the wheels/tires balanced and rebalanced at least 3 times trying to get to the bottom of things at a reputable local tire shop. Also I had a roadforce balance done. On the balance machine, things look good, balance properly and everything. The strange thing is, I can mark and rotate the wheels around, front to back and side to side and I still canít seem to isolate this problem. f The car (í04 330i) is properly aligned. The only think I can think of at this point is a defect in either the wheels or tires, but find it odd that I havenít been able to narrow it down to a specific wheel.

Help me figure this one out folks, I just donít know what to do anymore.

Last edited by Chrsb5; 04-01-2013 at 11:46 AM.
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Old 04-01-2013, 02:24 PM   #2
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are you sure its the wheels and not a control arm?
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Old 04-01-2013, 02:48 PM   #3
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I replaced both front control arms and fcabs already. If it was a non-wheel issue, like a control arm, it would seem to me that the wobble would persist from one set of wheels to the other. Tonight I am measuring the hub bore of both sets of wheels, just since I am out of ideas....

Last edited by Chrsb5; 04-01-2013 at 02:50 PM.
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Old 04-01-2013, 05:29 PM   #4
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Could the inside of the wheel, where it meets the hub be the problem ? The factory wheel has a distinct lip, and the Sportline wheel does not.

First picture is of the factory wheel. I put an arrow by the lip.



The second picture is of the Sportline wheel. it is completely smooth on the inside. no lip at all.

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Old 04-01-2013, 05:39 PM   #5
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Are you sure they are the right fitment? Looks like you need centering rings etc
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Old 04-01-2013, 06:31 PM   #6
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Also looks like you've got a nice crack developing in the newer wheels.....
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Old 04-02-2013, 10:38 AM   #7
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Originally Posted by invictus View Post
Are you sure they are the right fitment? Looks like you need centering rings etc
I think you may have figured it out!

I cleaned up the factory wheel with a little WD40 and a scotchbrite pad to get a better look at it. It's definitely very different. Here's a picture that clearly shows the beveled lip that the Sportline wheel is lacking.



I tried to use a vernier caliper to measure the inner diameter, but can't fit it inside the wheel, the slide bar part is too long. On lunch I'm off to the tire shop to see if they can shed some additional light on things.

These are the exact wheels
http://www.modbargains.com/Sportline...Wheels-BMW.htm

I think I may have been sold an incorrectly sized set of wheels.

Last edited by Chrsb5; 04-02-2013 at 10:51 AM.
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Old 04-02-2013, 11:59 AM   #8
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You may need hubcentric rings, but you should verify that with ModBargains. I'm sure they'd be able to tell you what the center bore is.
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Old 04-03-2013, 01:40 PM   #9
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Well I went over to a tire a wheel shop yesterday afternoon and the verdict handed down by the professionals. These wheels are incorrectly sized for the car!

This has been a massively frustrating experience that has been going on for nearly a year. For most of last summer, I was going back and forth to tire shops trying to get the vibration sorted out. I've had at least 3 wheel balances, a special(and expensive) road force balance, the tires un mounted, re mounted and balanced again.

So I'm left with an unusable set of wheels, and out several hundred dollars from chasing the vibration down.
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Old 04-03-2013, 01:53 PM   #10
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Having the center bore too large is fairly common actually, so I wouldn't say they are "incorrectly sized" necessarily. They just need a hub ring.

Wheel manufacturers do this so they can use the same wheels on various cars. Your BMW has a 72.6mm bore, but other cars that could use the same fitment may use a larger or smaller center bore. So they just make it more universal by making the bore larger, and then having customers fill the gap with a hub ring.
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Old 04-03-2013, 01:56 PM   #11
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Wait, are your wheels cracked?
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Old 04-03-2013, 02:58 PM   #12
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Also, that area does look like a hairline crack, but it's a little hard to tell based on the picture. OP, if you "scratch" that area with your fingernail, does your nail get caught on that line?

One of our coworkers had something similar on his wheels that he had on his old Benz.
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Old 04-03-2013, 03:11 PM   #13
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I have the same wheels and mine fit just fine...
You do have a crack though. That's not good
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Old 04-04-2013, 10:46 AM   #14
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Well there definitely is a crack, and it's deep. I'm emailing Modbargains...
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Old 04-04-2013, 11:56 AM   #15
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Wow, good thing you caught that!
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Old 04-05-2013, 10:23 AM   #16
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Well I sent an email to Modbargains.com yesterday afternoon, outlining the problems I've had with these wheels. Hopefully they will get back to me soon. Monday I'll follow up with some phone calls.
I've purchased a number of items from Modbargains.com over the years, for example the Eibach/Koni FDS suspension setup currently in the car came from Modbargains too. It was the mod I did just prior to purchasing the Sportline CS16s. We all know you can't go plus sized wheels on a stock ride hight without looking all SUV-like a goofy. Even prior to picking up the 330i, back when I drove an Audi and some watercooled VWs, Modbargains has been my go to place for aftermarket parts. I'm really hoping they will make this right.
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Old 04-05-2013, 10:38 AM   #17
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Your stock rims are so much better than anything sport line has ever made. Just put your stock ones on, save a headache, and bad performance.
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Old 04-05-2013, 02:06 PM   #18
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Your stock rims are so much better than anything sport line has ever made. Just put your stock ones on, save a headache, and bad performance.
Stock wheels have winter tires on them and are o on the car right now.

Still waiting to hear back from Modbargains. I'm none too pleased that it's been 24 hours without a response.
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Old 04-18-2013, 02:37 PM   #19
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After a bit of back and forth with the folks at Modbargains, they are doing the right thing and taking the wheels back. Now to decide on another set of wheels...
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Old 04-19-2013, 02:56 AM   #20
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Quote:
Originally Posted by Chrsb5 View Post
After a bit of back and forth with the folks at Modbargains, they are doing the right thing and taking the wheels back. Now to decide on another set of wheels...
Whatever you do, don't get Sport Line again; I recently read a review of the best and worst wheels to get. Sport Line made the worst list. Get a wheel that is hub-centric for your car (Beyern, Drag DR37s etc..).

Also do a little more research on which wheel is best for you and your budget. Tire Rack is a good place to start.

EDIT: The above information about Sport Line is incorrect. See post #24.

Last edited by HacksawMark; 04-19-2013 at 09:55 PM. Reason: incorrect info
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