Hello to proud fellow G37 owners,

I am new to this forum, and lately experienced this strangeissue. Like the subject says, yes my wife complains about this almost everyday. Please help and thanks so much.

· 2012 G37 Sedan RWD, 33K miles, bought pre-ownedin July 2014 with 30K. Clean Carfax, and it appears to have no body worked donefrom my visual inspection

· Car came with 17” stock wheels with almost nothread. I replaced with 19” OEM wheels & tires in late Aug (these were takeoff’swith less than 100 miles. Tires are brand new from Infinity factory)

· After the new tires, I noticed the tracks/unevenroad surface would grab the front tires. For example, there is a 1 mile stretchof freeway (near my house), and the steering wheel would turn left/right on itsown instead of staying straight. It basically follows those tracks, and I needto work hard to make it straight.

· The car tends to have no problem stayingstraight at lower speed and on better (more even/flat) road surface.

I don’t want to mislead you guys to the new tires, but I don’treally recall this problem before the new tires. I am personally OK with this,but my wife has been complaining every day. Guys, when she complains every day,it’s just not pretty. Please help me out.

Thanks so much in advance

 

You're either describing a car out of alignment, or you're describing a pronounced pitch on a familiar road. Most roads are intentionally designed with a crown for storm water run-off. Some roads are more obvious than others, and some cars more sensitive to it than others. Have the car aligned anyway, because that's always a good thing to do every few years, even without a change in suspension parts.

 

What tires were on before and what tires now?

Part of the issue is that there's a wider tread that has more road contact. There's also a lower sidewall profile that cushions road imperfections less than before. If you've changed from a bald tire to new ones, it also grips the road much better. It's additional traction she's feeling not less traction. The tires are gripping the road (with the ruts in it) and pulling the car along the irregularities rather than sliding over them without gripping.

 

Funny thing is... I experienced this same issue when I first bought my car too with the factory Dunlops on the 18" duck feet. Anytime I would ride a road with a worn in "track" or dip the car would pull right into the track or into the dip, literally having to countersteer out of it. Then I dropped my car on Swift springs.... Problem solved. Car is much more planted and I don't experience any of this anymore what so ever. I feel like the stock sedan sits too high (especially the X) which contributes to this problem along with sub par handling.

Soo more low = problem solved. Plus those coupe 19s will look a HELL of a lot better !!

 

Good read on tramlining.
http://www.tirerack.com/tires/tirete....jsp?techid=47

 

That's the word! I couldn't think of it earlier. LOL

The historic Erie Canal winds all through Rochester, NY, and I grew up in a Canal Town. The point is, we have all kinds of old bridges here with a metal-grid surface, and certain kinds of tire tread absolutely suck going over a canal bridge. It almost pulls the steering wheel right out of your hand.

You get used to it.

 

are your wheels staggered or square setup?

 

^ what he said. If these are the stock re050's, this is the same knight 'n day experience i would feel swapping between my winter/allseasons VS summers. Yes they're stiffer, noisier, but boy do i miss the grip of those tires!

 

I really appreciate all the feedback, guys. To add a few more details:

Old tires: Factory 17" wheels with no tread (can't recall the brand name). 225/55/17 all around. Basically stock everything from Journey.

New tires: Factory 19" take off from a 2013 coupe. I think it's got the RE050's with 225 front, 245 rear (not staggered).

I live in Seattle, and drive thru this section of I-5 almost everyday. Other than the G37, I had Infiniti FX35, Honda Accord & Oddysey, and none had this problem even with new tires. But like some of you pointed out, the RE050's are sticky (almost like summer tires, with treadwear of 140).

The new sticky tires along with the car's (factory) suspesion set up may contribute to the whole "tramlining". I read that article and definitely learned something new today.

IPP391 pointed out the swift springs helps. Well.... I am not really planning to lower my car (I had fun with my Nissan Sentra back in college days).

So, my wife is blaming me for swaping the 19" tires. She strongly believes this problem would not exist if I stick with 17". Well, 19" is just so much sexier than 17". How can I convince her, or how can I improve this issue to make her happy? Is RWD part the equation as well?

At the end of the day, making wife happy is important, yet a "very difficult" assignment.

Thanks so much, guys!

 

What do you have your tire pressure set to?

 

That will never happen lol. So just try and outlast her on this one, and she'll figure out something else to complain about (which hopefully you can fix).

 

Tell her it's not a "problem", it's driving a car. If she has a problem with having to actually control the steering wheel with her hands, she should get a chauffeur. Or a Camry.

 

The coupe 19s are staggered (narrow front rim/tire, wider rear rim/tire. The slightly wider setup can contribute to tramlining.

The RE050s are summer tires and also a much stiffer sidewall, this will result in more road feel and since you went to a 2" larger rim the sidewalls have to be an inch shorter to keep rolling diameter the same. The thinner sidewall profile results in a significantly harsher ride, and this is one issue that may be bothering your wife as well.

Having a rougher ride combined w/ some tramlining would be something that will take time to adjust to, hopefully time will make it easier to live with.
G/L

 

it sounds like you should go with a good all season tire.

 

That's only a 1/2" of stagger... 19x8.5" front to 19x9" rear. And it's only for the RWD Sport-package Coupe. The AWD Sport-package Coupe gets the 8.5" wide sport rims front and back.

1/2" stagger always seemed kind of pointless to me, but it is what it is.

http://infinitihelp.com/models/2013/...ifications.php