I installed a progress RSB and rear wheel spacers over the weekend and noticed a slight vibration at about 75mph when driving this morning. Checked everything and it's all secure and centered.
Any ideas what it is?

 

how wide are the spacers?

 

^regardless, it's your spacers that are causing the issue.

 

while I agree with spdandpwr its MOST likely the spacers....I have read that if the RSB is loose you will get some weirdness from that too.


remove the spacers and SEE if anything changes.

 

15mm. I've never heard of anyone having issues with them. I double checked all the bolts and made sure the hub centric ring was secure and everything.

 

how PERFECTLy balanced are your wheels? if a wheel is off slightly the spacers will make it much more noticeable.

what about the RSB. are you SURE its all super tight?

the links to the sway bar?

 

Like Rob said, you may want to remove the spacers and test. It could be the spacers, the wheel balancing or the way the wheel sits on the hub (that one is linked to the spacers).

Check also the lug nut torque.

 

This is one of the reasons that I've always recommended doing one mod at a time. That way it is easy to figure out which mod is to blame.

Rob is correct - it could well be your sway bar but spacers will exaggerate any badly balanced wheels.

 

Thanks guys. I checked the torque of the RSB and made sure it was balanced on each side and it was all good. This is my first experience with spacers, but I'm going to take them off this weekend and see what happens. If the vibration goes away, I'll know it's them and maybe try and find a better way to ensure a perfect mount or just have to deal with the back not being flush.

 

Most likely it's the spacers. Gotta make sure the mounting surface on between the spacers and the hub are clean. The slightest about of imperfection (heavy rust, debris, etc) will cause issues. Also, are these spacers requiring extended studs or just bolt on? If they are ones requiring extended studs, double check your studs to make sure they are seated properly and not distorted form the install.

 

It's the bolt ons. I cleaned the hub with cleaner and a wire brush. Other than cleaning the hub, usining the provided hub centric ring, proper torquing, and tightening the bolts in the proper order, what else can be done to ensure proper mounting? They are 15mm spacers, is there a chance the stock studs are too long and pressing against the back of the wheel causing the wheel to be off center?

 

some cars dont have an RSB.

and you can drive with out the RSB being connected.
although, keeping care of turning, because the back end will shimmy.


its the spacers, and or didnt tighten lug nuts all the way

 

Yeah I had this problem shortly after installing my wheels, and it ended up I just accidently torqued them too low. I'm going to be an echo and say it's the spacers as well.

 

Oh, well if the kid agrees, those damn things are coming off immediately! Haha, just messin. How's that spacer treating you? I honestly didn't notice any different after installing it.

 

Meh haven't installed it yet, waiting for a bolt kit to come in from P2R. Probably no difference since I already have an intake

 

I'm site you could have gotten a bolt at home depot.