Yes lol....waaay past air pressures.

 

Gotta ask.

After making a corner does the steering wheel return to center by itself or do you have to steer back to center?

I would personally increase the caster at least .5 degrees on both sides. The toe should be dead on 0 both sides.

 

But if you put those same tires on the opposite side of the truck, the tread faces the other way, and in accordance with your theory, pull the other way. Any pulling forces created by your bidirectional tread would cancel out, and your truck would go straight.

 

You're still not seeing it...maybe I can try to find a way to draw and illustrate it. It doesn't matter what side of the truck the tire is mounted on because there is a vertical centerline where the tread pattern is rotated 180 degrees making a symmetrical pattern. So, whichever way it is flipped, it will appear the same. I can't explain it well without an illustration.

 

It returns to center slightly, but not much. It never has, even brand new with stock tires is didn't. I have already increased the caster drastcially. It has doubled from what it was.

 

Do the wheels spin freely when jacked up? Bad wheel bearing? One hub not unlocking? One brake dragging? We have a whole list to go threw, its gonna be fun!

 

No expert here either, but would the toe out/in on the rear axle have an effect on this? According to those specs, it looks as if your rear end isn't perfectly straight.

 

LOL yes, we have already been through the whole list. So has the alignment shop lol. Wheel bearings checked good. Hubs are both unlocked with no issues. Brakes are brand new and not dragging. I am really hoping it is just the stabilizer but I am waiting for this weekend to yank it off.

Yes, it's aimed to the right, which would push the truck to the left, but everything I have found leads me to believe that the 0.2 degrees is not enough to cause what I am experiencing. Maybe I am wrong though. I am considering jacking up the truck and turning the key on and seeing if the stabilizer pushes the wheel at all off center. Might be easier then removing the stabilizer for a test.

 

Please don't be condescending just because you disagree.

Look at the Nitto Trail Grappler. It's got essentially the same design elements as you're referring to. But you're alleging that Nitto tires pull left and Toyo tires pull right. What about the millions of Nitto and Toyo tires sold with no such allegations made? What about the millions of other similarly designed tires with no such superstition surrounding them? It's a case of people finally noticing a behavior (that is wildly affected by things like road crowning and so forth) and leaping to conclusions as to the actual cause. Go ahead, swap on a set of Nittos and see if it suddenly starts pulling left instead. Easy to test.

If it's a real problem, it would be a real problem EVERY TIME. Like I said, show me a TSB or other such notice from Toyo. Or any tire manufacturer ever, for that matter.

 

Firekite is sort of confrontational about this, but I think he's right. I definitely don't buy the argument that certain tires will pull one direction or other. The only way that's possible would be if they used directional tread, and if a tire company were to do that they'd never sell them.

 

I was not being condescending at all, if it was interpreted that way, then I am sorry. I understand your point of view entirely, and the skepticism is valid. However, I also have read enough examples of people changing sets of tires out and the pull going away, to believe this. Regarding a TSB...I will contact Toyo and see if I get a response. I believe the reason it is not a problem on every set of tires if because everyone's truck is different. And, as most threads indicated, most shops can adjust the caster to correct for the pull. As for the nittos vs toyos, take a look at the tread pattern. The nitto's are a mirror image. The outside tread blocks go in the opposite direction, so yes, it would pull left. Look at them side by side. Toyo and Nitto.

This is actually the opposite of what would be true. A directional tire would be the most stable, but only in the forward direction obviously. And there are more than a few dedicated M/T tires which are directional. I think everyone is getting caught up with the tire discussion, but I do not think my issue has anything to do with the tires lol.

I really am not trying to be argumentative, I am just trying to explain the information.

 

Has the shop rotated the wheels and tires just to be sure?

 

But how is a tire going to be able to pull one specific way when it can be rolling either direction? Directional tread is the only way you can assure that a tire will only roll a certain direction. I'm sure some funny tread designs on directional tread could produce a predictable pull. :-confused

Glad to hear it, I'm certainly enjoying the discussion.

 

Yep, tried multiple times.

This is what I was trying to explain to redford. Because the tire is symmetrical, it will have the same habits no matter which way it rolls. That is why there is no left or right side. If you open the link I put for toys in my last post, right click and save the image of the face oft he tire tread. Then open it in Paint or whatever program you have, and rotate the image 180 degrees. You will see it now looks like the bottom half of the same tire, the tread looks the same, because it is. It is symmetrical. Now look closely at the tread blocks that are angled on the outside of the tire edges. They are angled in the same direction, pitched left upwards to the right. Looking at the picture that is rotated 180 degrees, the angle is still exactly the same. So do you see how no matter which direction the tire rolls, the outside tread blocks only angle in ONE direction? So if these tread blocks have more leading edge hitting the ground than the center treads which counter act the angle, then the outer tread blocks will have a slight gain to one direction over staying neutral. This is what causes the tire to shift ever so slightly to the side as it rolls. Not enough to notice at 10mph, but going 60mph you will. Now, this is just what I have theorized, and it makes sense to me. But I just emailed Toyo so we will see what they say, if they respond lol.

 

Fair enough.

First, no, not everyone's truck is that different. Second, and more seriously, caster angle cannot possibly have anything whatsoever to do with that. It's entirely unrelated. You cannot adjust caster angle to induce nor eliminate pulling left or right, regardless of the actual cause.

I didn't realize you were calling BS on the tire thing. Either way it's difficult for me to let fundamental misinformation stand. Others may read this and be suckered into thinking there may be something--anything--to this tire thing, when in reality it's a bunch of hooey.