Excessive front tire wear - Defender Source
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  #1  
Old March 29th, 2015, 01:50 PM
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Excessive front tire wear

I was out looking at my tires (235/85 R16 KM2) with 6,000 miles on them and noticed the front two have approx half of the tread left where the rear look new. There is no way this wear is normal. The vehicle is 110, 300tdi, standard bumper, no accessories. Any ideas?

------ Follow up post added March 29th, 2015 12:59 PM ------

Possible slight front brake drag? When very damp in the morning I do get a brake squeal until the vehicle warms up and I could never find the cause.
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  #2  
Old March 29th, 2015, 08:03 PM
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Are the tires worn on the side, in the middle or even all the way across? What air pressure are you running on the front as to the rear?
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Old March 29th, 2015, 08:05 PM
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Quote:
Originally Posted by JSBriggs View Post
Make sure your toe is adjusted properly (that is the only adjustment),and rotate the tires regularly.

-Jeff
almost certainly alignment
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  #4  
Old March 29th, 2015, 09:09 PM
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All tires are worn equal across the top. The front is just very excessive for 6,000 miles from new. The tires are all at 75 psi. I had a front end alignment done 3 months ago.
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  #5  
Old March 29th, 2015, 09:22 PM
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Check the alignment yourself. You only need a tape measurer.
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Old March 29th, 2015, 09:27 PM
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Quote:
Originally Posted by JSBriggs View Post
Are you driving with the center (Tcase) diff locked? That will cause excessive wear on the front. -Jeff
As per all levers I am not. I have no weird steering / traction issues. I did check. I honestly checked a few times. Just did an 800 mile trip and cruised 70 mph on I-10.

------ Follow up post added March 29th, 2015 08:29 PM ------

Quote:
Originally Posted by Red90 View Post
Check the alignment yourself. You only need a tape measurer.
Just measure between the two tops and two bottoms of the tires? The even wear is what confuses me though.
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  #7  
Old March 29th, 2015, 09:34 PM
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75psi???

That doesn't sound right .... Unless you are Ronnie who inflates tires to the max rating printed on the casing ...
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  #8  
Old March 29th, 2015, 09:36 PM
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No the front and back. It is in the workshop manual.

75 psi is way too high. 35 would be fine.
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  #9  
Old March 29th, 2015, 09:39 PM
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Quote:
Originally Posted by Ncrover725 View Post
Just measure between the two tops and two bottoms of the tires? The even wear is what confuses me though.
With the steering wheel centered, measure the distance between the middle of the "front" of the two front tires and the "rear" of the front two tires.

By the way, 75psi is way too high for a car tire. Per factory spec, you should be running 28psi front and 32 rear.

If you truly have 75psi in your tires, then there is absolutely no doubt that they will wear out much faster than normal, since you are driving on the very tippy top of the tires. I'm also surprised they haven't exploded on the highway.
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  #10  
Old March 29th, 2015, 09:50 PM
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Quote:
Originally Posted by leastonce View Post
75psi??? That doesn't sound right .... Unless you are Ronnie who inflates tires to the max rating printed on the casing ...
I apologize...its 50 psi.. I was in the middle of finding my missing Lab and a 3 year old wanting to pee pee in the front yard
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  #11  
Old March 29th, 2015, 10:03 PM
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Quote:
Originally Posted by Red90 View Post
No the front and back. It is in the workshop manual. 75 psi is way too high. 35 would be fine.
Just found the dog.. And dropped tire pressure to. 35 psi
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Old March 29th, 2015, 10:07 PM
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Stand back and sight down the tires. Do they all look online and parallel?
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  #13  
Old March 29th, 2015, 10:20 PM
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Quote:
Originally Posted by Red90 View Post
Stand back and sight down the tires. Do they all look online and parallel?
The all look online and parallel. I do get a bit of continuous brake dust on the white steel rims (front)... This plus the slight squeal at times is why I wondered if a slight brake drag would create a slight drag to create uneven wear on the front end.
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  #14  
Old March 29th, 2015, 10:32 PM
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So were you running 75psi? Or 50? Or 35?

At 75psi or 50 psi I can imagine the tires getting too warm and accelerated wear occurring.
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  #15  
Old March 29th, 2015, 10:39 PM
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Quote:
Originally Posted by leastonce View Post
So were you running 75psi? Or 50? Or 35? At 75psi or 50 psi I can imagine the tires getting too warm and accelerated wear occurring.
Running at 50 psi
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  #16  
Old March 29th, 2015, 11:06 PM
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Brake drag is not going to affect tire wear.

Air pressure is way too high. The tire's maximum air pressure is to be used only when the tire is carrying its maximum load.

Air pressure WILL affect tire wear negatively. Your KM2's are 80psi max at 3,042 lbs per tire. At 50psi, you're inflated at roughly the load rating for 1900 lbs per tire or 7600 lbs for the entire truck. Unless you've got 3000 lbs of expedition equipment bolted to your truck, your contact patch is no doubt far smaller than normal. If you were running at half the contact patch, then you'd be doubling the wear of your tires, which makes half tread at 6,000 miles altogether reasonable.

Unless you drive your car in a straight line for eternity and never turn or brake, your front tires will always wear faster than your rears. This is a large part of the reason why tires are rotated.

Also, while your rears appear to have "normal" wear, they are actually probably wearing much faster than if you had inflated them to the appropriate pressure.
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  #17  
Old March 30th, 2015, 08:12 PM
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The fact that the tires are wearing flat across tells me that more might be going on than just pressure. If a tire is overinflated it will wear fast but more in the center of the tire. Of course with mud tires it might be hard to tell. Do you still have tread on the edge blocks or is the wear flat across like you put a ruler down and it was contacting everything the same?
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  #18  
Old March 30th, 2015, 08:21 PM
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This thread is useless without pics
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A friend of mine runs a land rover / range rover specialty repair shop. Based on his experience, they are capable of stopping anywhere, anytime, at any cost.

I don't know about the brakes, only their unreliability.
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  #19  
Old March 30th, 2015, 08:58 PM
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Take a string and wrap it hub height all the way around the truck. It will hit the front and back of the rear tires and if they are perfectly straight, the string will hit the front and back of the front tires. Most people run with slight toe out, in which case (with the tires pointed straight forward) the string will hit the front of the front tires and just slightly miss the rear of the front tires. Maybe 1/8" - 1/4". Just slightly toe out. Helps you track, too...
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  #20  
Old March 30th, 2015, 09:08 PM
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I used the ghetto method when I installed my new track rod and drag link last week. Axle up on jackstands and wheels off. I had a 2' long board that is probably 2" wide x 1/2" thick that I salvaged from an Ikea bed that I drilled a hole in the same size as the wheel stud in the center of. Put said hole in board over a wheel stud at 12:00 and put a level on the top. Made board level and snugged down lug nut on board. Measure distances from rear axle and front of axle. If not the same adjust track rod to get the measurements equal. Tighten up all adjusters and if your wheels/steering wheel aren't pointed straight adjust your drag link till they are.

If your tie rod ends are loosey goosey then fix those first as setting the toe with knackerd tie rod ends is a fools errand..
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