Uneven Tire Wear... Help! (not alignment based)

Hello, I have an unusual situation here in which I cannot find coverage in any forum so far. Both front tires of my Tacoma are wearing unevenly and very fast along the outer edge. I have had the alignment checked and every measurement was within proper spec. I am now unsure whether my issues lies in tire balancing, or maybe a suspension/ tie rod issue...?

The truck drives straight with no wobbles or pull and does not express any other issues besides this worsening tire wear. These tires front tires were installed brand new at the same time as the corresponding rear tires. Any advice or help on the subject is greatly appreciated!! Thanks!

 

Stock suspension?

 

Too much toe-in will cause that.

 

Could be bad front shocks. Could be improper air pressure.

 

Stop corning so fast

 

Yeah, stock suspension.. my first thought was too much toe-in but clearly alignment results show that isn't the issue. Maybe i need to look into suspension.

 

I would call that normal for tires that don't get rotated. Think about what happen when you turn all the weight is shifted to the outside.

 

My opinion as a non-professional...

It's the combination of toe being a bit high plus the positive camber causing outer edges to scrub. Bring the camber and toe both closer to zero. But, that might cause caster to drop since it's all related. Lowering caster can make it feel less stable at speed.

0 camber
0.04 toe in total
2.5 or more caster is what i liked.

If truck is lifted, you may not get those numbers without aftermarket upper control arms.

Edit: remember that "in spec" and "good" might not be the same ranges.

 

Exactly.

I’ve read numerous posts about people noticing that the factory specs are questionable. Specifically visually noticeable camber.

For whatever that’s worth...

 

Interesting that you say that, totmacher and Rujack... I know better than to visually diagnose alignment issues, however the truck does appear to show positive camber in the front wheels when viewed straight on from the front. Thanks for the insight

 

Exactly this.

 

I hate Hunter for doing that green or red zone crap. Just because something reads green does not make for ideal alignment or tire longevity. Most of the cars that leave my work leave in the red especially for rear toe because usually numbers above .08* for total toe will wear tires over time in the typical "toe scrub style." Front readings are always green, however, and that much they got right on just about every vehicle in their database.

Get your camber out to zero on both sides or just a hint negative. Your outer wear is due to positive camber, and as mentioned rotate your tires. Toe at .08 or .09*

The OE turning must be absolute garbage, I've been running negative so long that I forgot what the sound of scrubbing tires sounds like while turning.

Your right rear has high toe as well. You might want to correct that with a toe correction plate or get your leaf springs checked.

 

You may want to go back and look at his rear tires again them are fine both fronts are worn.

 

Well aware.. but his thrust angle is high and almost past the threshold of the point where he would be pulling. Also, his tire is like this / instead of this | in the right rear. One more thing. He posted all four tires wearing so I don't know where you got two.

 

Back to what I said before rotate your tires. "Hello, I have an unusual situation here in which I cannot find coverage in any forum so far. Both front tires of my Tacoma are wearing unevenly and very fast along the outer edge".

 

too much toe in, and is that a tick of positive camber ? that combo will do it.

 

OP, lots of good suggestions on here.

How many miles on the tires and what interval do you normally rotate?
How long since the last rotation?
What is the tire pressure set on all 4?

Also, not a very likely, but possibility. These trucks are notorious for wheel bearing failure and that usually doesn't show up in alignment numbers. Are you running the OE wheel bearings?

 

Check wheel bearings while youre at it. Loose bearings caused the exact same wear pattern on a truck I once owned. That's assuming that you rotate your tires, because I agree with everyone above. If you see more wear on the fronts, rotate your tires. If you see the fronts wearing so fast you notice it between oil changes, thats when its a problem.

 

The truck is a recent purchase so I do not have information on past tire rotation intervals or mileage aside from what the seller shared. (which doesn't necessarily seem true.) I'll be attacking this thing from many angles it seems to combat a number of probable conditions. Wheel bearing inspection and a clean up in camber/toe-in is where I plan on starting as well as a rotation.

Thanks all for the help!

 

If you get the wheel bearings, get them from one of the members on here in HI. @05Taco4x4

https://www.tacomaworld.com/threads/wheel-bearings-hubs-press-service-4x4-prerunner-nsk.537080/