I just put some 19" wheels with 245/45/19 Pirelli tires from 2011 Mustang GT on my 2006 Mustang Pony Convertible. It seems to tramline with this set up much more than with the 17" stock wheels and tires. Is there a way to get rid of some of the problem if not all? I have adjusted air pressure between 28lbs to 35lbs with little noticable difference. I am not positive on the wheel width now...either 8.5 or 9".

 

Try adding a little toe in. Toe is very each to adjust. You have a tire rod on each side of your front end. The tie rod end link is connected to your spindle/knuckle. The other side of the end link is threaded onto your tire rod. There is a jam nut that keeps them secured. The tie rod has "flats" on it. Mark the "before" position with a paint pen. Using a wrench, loosen the jam nut. Then turn the tie rod 1 flat in the counter clockwise direction (as you are sitting there looking at the tire rod, put a wrench on it and move the wrench up - counter clockwise). Tighten the jam nut. Do the other side exactly the same way. Go drive it. If it trammels more...you turned them the wrong way - toe out. If it trammels less, problem solved. If your steering wheel is off center you turned one tire rod more than the other. If you don't like the result...well thats why you mark the "before" postion. Good luck.

 

Going from the stock 235's to 245's, even with a taller tire, shouldn't have had THAT much affect on tramlining since the section width changed by only ~0.4". I'd raise the front tires and verify that the wheels are seated properly/retorque the lug nuts and go from there. If that doesn't help, then Argonauts recomendation may be your answer.

 

I agree - my 255/45/18 snow tires don't noticeably tramline but my 285/40/18 summer tires sure do.

 

I had the 245/45/19 factory tires on my 2011. No tramlining. As mentioned, check the alignment. If toe around zero or even toed out you may find the steering a little darty and mistake this for tramlining. Think the the factory optional wheel with this tire is 8.5 inches and they will not fit over the Brembos.

Cheers.

 

I did the exact same thing, put a set of 19"s from a 2010 GT, looks great, but the detriment to the handling was just not worth it. I'm putting 17"s back on. The thing was tram lining all over the road, not all the time, sometimes hardly at all, but other times, on certain stretches of road, I was sure it was going to get me killed. Those wheels are not only wider, but have much more rotational mass, and unsprung weight. I loved the way the car handles with the stock wheel/tire combination, but hated the change with the 19's. I don't know, maybe the GT suspension is somehow different to accommodate those wheels, but on the V6, they're downright scary.

 

I agree completely with Argonaut. Toe will fix it if you get it right. Different tires respond differently, mainly that some are more sensitive than others. But there is a setting that works, you just have to find it.

 

Those 19" wheels *may* be running a slightly different offset than the older 17's. Dialing in just a little (or a little more) toe-in should fix this.

Tire/wheel combinations that are stiffer laterally are likely to "want" a slightly different set of alignment settings. In this case, I'd expect the change in profile from 55 to 45 to be a bigger influence than wheel diameter or tire section width, and wheel width to be more important than wheel diameter.


Norm