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Any of you encountered this?

This is a discussion on Any of you encountered this? within the Wheels and Tires forums, part of the General Help category; Alright... so you've just bought new wheels and tires for your car, you have them professionally installed and it looks ...

  1. #1
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    Any of you encountered this?

    Alright... so you've just bought new wheels and tires for your car, you have them professionally installed and it looks great. But you get on the highway and around 65-70MPH the car shakes... I know all the culprits that may cause this as far as the wheels not being balanced, Hub Centric, etc.

    Here's the deal. I've had the balance checked twice. Turns out fine. I had bought hub centric rings but the installer never installed them and by the time I had noticed it'd been way too long to ask them where they were.

    The wheels were bran new (Ruff 280's). Do you think it may be the centric being off of the wheels? the difference is (stock hub: 70.10mm, Wheel: 73.10mm) not a ton there. My only other idea is I have a bad wheel somewhere.

    Anyone else encountered a similar problem?

    Or what do you guys think?

    Thanks a ton!!!
    Last edited by architect7; 02-25-2009 at 08:46 PM.

  2. #2
    Senior Member mrr23's Avatar
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    these cars are lug centric; centered by the lugnuts. the hub ring helps some.

    you may have a slightly bent wheel or out of round tire.

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    Member El Toro Loco's Avatar
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    tie rod end might be screwed up

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    Quote Originally Posted by mrr23 View Post
    these cars are lug centric; centered by the lugnuts. the hub ring helps some.

    you may have a slightly bent wheel or out of round tire.
    "tie rod end might be screwed up"

    aside from a bent wheel. how can I check the other possibilities?

    Thanks

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    Quote Originally Posted by El Toro Loco View Post
    tie rod end might be screwed up
    How can this be checked?

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    Firebird Encyclopedia 9T8W66's Avatar
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    The Ruffs use a 5x120 bolt pattern where as the F-body bolt pattern is 5x120.65
    Obviously it does work but you need the hubcentrc rings.
    I've had my 5x120 wheels with hubcentric rings on for 4 years now and no vibration problems.
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    Quote Originally Posted by 9T8W66 View Post
    The Ruffs use a 5x120 bolt pattern where as the F-body bolt pattern is 5x120.65
    Obviously it does work but you need the hubcentrc rings.
    I've had my 5x120 wheels with hubcentric rings on for 4 years now and no vibration problems.
    awesome... I guess if they don't work, I'll look at trying to figure out if one of my tires is out of round. did you use 70.3mm x 73.1mm? or did you just use a 73mm?

    Thanks for the info.

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    Firebird Encyclopedia 9T8W66's Avatar
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    Quote Originally Posted by architect7 View Post
    awesome... I guess if they don't work, I'll look at trying to figure out if one of my tires is out of round. did you use 70.3mm x 73.1mm? or did you just use a 73mm?

    Thanks for the info.
    When I orderd my wheels I got an installation kit that came with lugnuts Valve stems and the rings.

    Try here
    http://www.justforwheels.com/index.j...b=how&track=WM

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    Quote Originally Posted by 9T8W66 View Post
    When I orderd my wheels I got an installation kit that came with lugnuts Valve stems and the rings.

    Try here
    http://www.justforwheels.com/index.j...b=how&track=WM
    wow... 2.8mm is only 11 hundredths of an inch... Could that really make the car vibrate???

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    That guy thearborbarber's Avatar
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    At 60mph factory diameter wheels are turning 813rpm. It would be like having a 1/8 flat spot on a tire of sorts

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    Member TRANS-DAD's Avatar
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    YEP....... There's a reason for tha hub ring , had to use them on my RUFF's

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    Quote Originally Posted by TRANS-DAD View Post
    YEP....... There's a reason for tha hub ring , had to use them on my RUFF's
    So you noticed a vibration with the 11 hundredths of an inch and put on the rings and vibration gone? That's great if so. I ordered a set about an hour ago. Thanks again guys. Don't know what I would do without this site. ha ha

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    Quote Originally Posted by thearborbarber View Post
    At 60mph factory diameter wheels are turning 813rpm. It would be like having a 1/8 flat spot on a tire of sorts
    So you're saying that little fraction sure would cause it to shake huh? okay. I've bought the rings and hopefully I'll have them on this week and I'll keep you all updated.

    And you're saying those wheels rotate 13.5 rev per sec? that seems high to me, but if you say so, I take your word.
    Last edited by architect7; 02-23-2009 at 10:20 AM.

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    Quote Originally Posted by thearborbarber View Post
    At 60mph factory diameter wheels are turning 813rpm. It would be like having a 1/8 flat spot on a tire of sorts
    Wow... ha ha. you nailed it. I did the math and you're right on.

    60MPH = 316,800feet/hour

    so, 60MPH = 88feet/second

    our wheels are 25.7" in diameter so the circumference is 80.7" = 6.73feet

    Divide the 88feet/second by the 6.73feet = 13.1 revs/sec.

    Sorry I doubted you. ha ha

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    Firebird Encyclopedia 9T8W66's Avatar
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    Be aware that when you go to install the wheels with the rings on that they will be very tight I actually had to tighten them down untill the wheel touched the rotor using the lugs. Then backed them off, snugged them, dropped the car and torqued them to the correct 100 ft lbs in the star patern.

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    Quote Originally Posted by 9T8W66 View Post
    Be aware that when you go to install the wheels with the rings on that they will be very tight I actually had to tighten them down untill the wheel touched the rotor using the lugs. Then backed them off, snugged them, dropped the car and torqued them to the correct 100 ft lbs in the star patern.
    Great info. Thanks!

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    Member Speed_kills_WS6's Avatar
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    I didn't experience this with my R280's. Since I've had them, my car has never ran smoother. Even at speeds over 100 is super smooth. The hub rings came with my wheels, should have came with yours as well if it was known what they were being installed on.

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    Quote Originally Posted by Speed_kills_WS6 View Post
    I didn't experience this with my R280's. Since I've had them, my car has never ran smoother. Even at speeds over 100 is super smooth. The hub rings came with my wheels, should have came with yours as well if it was known what they were being installed on.
    I'm confused... are you running your rings with your wheels. I had a horrible experience just getting the d@mn wheels from the seller. I wasn't going to expect them to send the rings too... honestly i figured I'd be doing well to get two and a half of the wheels from them...

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    Member Speed_kills_WS6's Avatar
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    There was a ring packaged with each wheel. They were almost thrown away; one of the guys were about to chunk it in the trash and the owner walked over and said they were needed. Two of the wheels had already been put on my car and they had to remove them to attach the rings to the hub. It was a nightmare getting the wheels, too many distributor/dealer parties. After two weeks from ordering, I finally had them. I suppose it was worth it though.

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    Quote Originally Posted by Speed_kills_WS6 View Post
    There was a ring packaged with each wheel. They were almost thrown away; one of the guys were about to chunk it in the trash and the owner walked over and said they were needed. Two of the wheels had already been put on my car and they had to remove them to attach the rings to the hub. It was a nightmare getting the wheels, too many distributor/dealer parties. After two weeks from ordering, I finally had them. I suppose it was worth it though.
    Be happy it only took you two weeks! After about two months and finally the threat of small claims court I got them. They arrived at the wrong address on top of all things. At the time I said it wasn't worth it, but after a years worth of cooling down, I'm glad I have them.

    Thanks for the info, your car looks great.

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