I’m getting tire chunking on my F250. I have 27k miles on it. It’s only the front tires. Had the dealer do an alignment and rotate the tires. So now the ones from the back that had no issues are showing signs of chunking. I don’t off road or drive crazy. Any ideas? I’ve tried google and can’t seem to get anything that points to a cause. Any help would be appreciated.

 

That almost looks like a heat related issue. What tire pressure are you running? My driving conditions are rather mild too...no serious off roading or heavy hauling and my oem Wranglers only lasted 25k, but there was no tread chunking.

 

air pressure comes to mind 1st

go on BFG website and get inflation pressure for your size tire and LOAD
yes you need to know what the front axle weight is

or use sticker on door jamb as a guide, set pressure, and then adjust it 2 lbs up or down and see if it levels out
ideally your contact patch on the road should be EVEN across the read contact
right now it seems by the pics your are slightly over pressurized and its letting the edges scrub and over heat, which causes the tread to start to let go. the pics are a bit hard to definitely tell, but over inflation is my first long time expert assumption, but they also could be slightly under inflated. i would say do the test below and go from there
my truck lists cold front as 60 and rear 65, i played with them for weeks and now run empty (full fuel and 2 people) 62 up front and 60 in rear

if you lay steel ruler across the tread, it should be touching pretty equal across the tread at the top of tire with a slightly less touch on edges

if you can, lay on floor lookign at tread and use bright light and you can see if tread is evenly contacting floor or smooth pavement. you can also apply some tire dressing to the tread all the way around the tire, then slowly roll fwd a turn of the tire and it will indicate if your tread is touching evenly.

most never adjust down the actual load versus psi. i do it on my bus so i get max life and tread wear from the tires, they have a 130 psi rating, but based on axle weight and manufactures recommended psi i run 105
light truck and car tires are the same, but its difficult to find the inflation tables on some tire websites.

 

My first thought was maybe toe is set wrong, but it sounds like that would result in "feathering".
I found one online source that says chunking can be an indication of a suspension problem, typically a bad shock according to them.

 

warranty claim under Fords new tire warranty?

 

Not sure what the warranty coverage is on tires. Mine just says tires are prorated after 12k miles driven.

 

Thanks everyone for the input. I was checking tire pressure at cold to match recommended settings. I have another dealer appointment on Tuesday to see what they say.

 

The shocks on these trucks are not known for their longevity. Visually how do your fronts look, any fluid on the bodies?

 

Yeah They always do this it happened in 2017 and my 19 usually starts about 20,000 miles if u got 27,000 time for new ones plus shocks

 

your not kidding.I decided to put some fox shocks on my 19 with 17,000 miles on the clock,front and rear factory had no signs of leakage,but when I collapsed them,guess what.they didn’t come back up!

 

I think a set of shocks should do the trick.

 

What kind of tires are these? Michelin are known for chunking. Usually down to the cords though.

 

If these are the goodyear adventures with Kevlar. My dad has went through 3 sets of these is his chevy 3/4 ton all three sets have done this right around 20k on his trucks. Switched to duratracs and so far hasn't had the problem. I have the adventures on my truck so I'm expecting this to happen