Freeway tire grooves swaying car

[fuelsipper]

Are other people having problems with the grooves making their car sway like your driving drunk? Maybe I need an alignment? I put on 300 miles yesterday from Seattle to Vancouver, Wa. It was terrible unless I drove in the fast lane. It looks to me the grooves are from the wear in the tire tracks. I also bumped my tire pressures up to 45psi. Its mostly 70mph also.

[aisbell]

This is standard Insight behavior with RE-92's installed.

[Willie Williford]

Rear track width is the culprit. I used 1/8 in. spacers on the rear wheels to correct. It got rid of probably 90% of the "wiggle". Calif. is really bad with the rain "grooves".

Willie

[fkertis]

I thought the rear wheel narrow track was designed in for mileage purposes. Did your spacers hurt fuel economy any?

[Willie Williford]

No (Aero) and No.

Willie

[fuelsipper]

Well then thank you for the information. Looks like I have to find out about spacers. I did have some new RE-92's installed a few weeks back. Didn't notice it with the old RE-92's. Weird.

[eq1]

A friend of mine installed 1" spacers on the rears to get rid of the same thing you describe. He said it worked great... Freeway is terrible ~seattle to tacoma...

[seabag]

Apparently this is also a problem with motor cycles. Pounding on the freeway essentially wears gutters. I have found that riding up on the shoulder of the gutter works pretty well, run just a little right of where 90% of the traffic goes.

[spets]

You can run a maximum of 25mm spacers on the rear without having to modify the factory spats. I used Ichiba spacers:

Ichiba V2 25mm Wheel Spacer 4x100 56 1 Acura Honda | eBay

[talonmike]

Spets, how does this work? the original nut hide completely in the spacer? Studs are not to long?

How many milimiters we need to align with the front?&