I just got my new rims yesterday and they are 17s with 205/40 17s on them and now I get very ba vibrations when slowing down. Does anyone know why this would happen or what I could do to fix it? Any help would be appreciated

 

i don't know if this is it but just the other day i took my cobalt to the dealer ship bc i also had very bad vibration when braking and the said my routers were warped... they fixed it by turning them...

 

Your routers, huh? Yeah, my home LAN network make my car shake too...

Sorry, it was too easy.

Anyway, when troubleshooting anything, the phrase is "look where the light shines best". You replaced your wheels, now they vibrate. So it's probably your wheels. Did you have them balanced before you put them on? Try a rotation to see if the vibration goes away. And if it does, remember that doesn't mean they are fixed. It just means the bad wheel is on the back now.

If that doesn't fix it, try moving on to the brakes.

 

Thanks I'll try switching them. I got the wheels from wheelsnext.com so they came mounted and balanced.

 

if you take your wheels off...are there small metal clips on the wheel studs? if so take them off...this caused vibration on my first set of wheels.

also make sure that your lug nuts are torqued correctly and none of them are loose.

whenever you say you have an issue like this everyone always says its the rotors that are warped but I'm willing to bet its one of those two issues above.

 

Yes there are like two "clips" that look kinda like washers with cuts in them so I'll have to try taking them off and see if that helps.

 

Has anyone put the EBC rotors on the 2.2? Or does anyone know if they match the stock rotor size dimentions?

 

im pretty sure those "clips" are what make your wheels balanced....taking em off would mean your driving on unbalanced wheels

 

If you're talking about the clips on 2 of the lug bolts, they're there to hold the rotor in place when the wheel is off. They also cause the wheel not to seat fully on some wheels.

If your wheels are open design (you can see the rotors well through the spokes) reach in when the brakes are cold and see if the rotor will shake in-and-out. Amazingly, on my SS it turned out the wheel was torquing down against the center hub, and not seating against the rotor. This turned the rotor into a "floating" rotor, letting it wiggle a bit. Since it wasn't clamped down, it couldn't disipate heat into the hub and wheel, and it warped big time and quickly. We used a wire brush and cleaned the hubs real good after putting on the replacement rotors and made sure the wheels torqued down against the rotor, not the hub. This cured my problem.

I must say I've never seen this on any of my 54 previous cars!

 

Those rotor clips are actually assembly line disposable parts. They are just there to hold things in place until the wheels get bolted on. On stock wheels, there is actually a small recess cut into the back of the wheel to allow space for those clips. Some aftermarket wheels will not have that, and will end up torquing against the clip instead of the rotor. Take the clips off and toss them.

Also, there is a subject I'm not too knowledgeable on concerning the use of aftermarket wheels. I have heard that a wheel lug spacer plate of some sort should be used to prevent vibration. But I have never seen one, so I don't know. Can anyone post a pic or chime in on that one?