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#1 (permalink) Old 09-29-2009, 09:20 AM
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Default Strange tire wear

All four tires on our 2007 Rondo are excessively worn on the inside edge. The wear is almost identical on each, except that the rears have gone through the first layer of rubber to the underlayer.

The car has about 62000 Km on it now and I had a "Service 2" done on it in August at 54000 Km. I wanted it thoroughly checked out because we were going on a driving vacation with another couple.

The vacation accounted for approximately 5500 Km of the mileage between service intervals.

My dealership is telling me that a) the tires need to be replaced (duh); b) the wear is due to alignment; c) Kia warranty for alignment is one year 20000 Km.

Has anybody else experienced this kind of situation? A mechanic friend says he has never seen all four tires wear exactly the same like that. The Kia tech. who checked it over for me also couldn't explain how all four wheels could be out of alignment exactly the same (he is the same tech that did the previous service and insists he would have noticed unusual wear, suggesting that all the wear occured since the servicing.)

I am especially interested to know if the fact the vehicle was fully loaded and driven long distances at high speed could have caused this. If that is the case, then Kia should be warning against loading the car.
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#2 (permalink) Old 09-29-2009, 09:52 AM
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could you overload the car? How many people were there and what luggage did you take? (anything on the roof?)

what about pressure? and one more thing - did you rotate them? could it be that this issue is only front or rear related, while rotating tires made you think about all 4 wheels...

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#3 (permalink) Old 09-29-2009, 10:22 AM
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How much worse is the inside edge vs. center vs. outside edge? Since the tires already had 54000 km on them before the trip, maybe they were nearing end of life anyway, but with balanced wear you didn't notice. Then the trip with the Rondo fully loaded, or maybe overloaded, the inside edges worn more and therefore the wear becomes very obvious. So, again, if the inside edge is worn down to less than the minimum tread depth, how much tread depth is left on the outside edge? 3/32" is the minimum in the US to pass most safety inspections, I think that is 2.4 cm, but may be wrong. Typical new tire tread depth is between 9/32" and 11/32 " (7.1 cm - 8.7 cm)

I doubt the problem is alignment related since you have apparently gone from 4 normal wearing tires to four inside wearing tires in 8000 km. But maybe the Kia tech didn't pay enough attention at 54000 km checkup. I would get new tires and measure tread depth from outside to inside maybe every 15000 km to see if the inside is always wearing more.

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#4 (permalink) Old 09-29-2009, 02:58 PM
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Originally Posted by PLP View Post
could you overload the car? How many people were there and what luggage did you take? (anything on the roof?)

what about pressure? and one more thing - did you rotate them? could it be that this issue is only front or rear related, while rotating tires made you think about all 4 wheels...
There was nothing on the roof. Four (normal sized) adults plus luggage inside. Could it have been overloaded? If so, I am very disappointed.

Pressure was whatever the dealer set it at. They told me that it was 40 psi when they checked yesterday, but that would make me think that the tires would wear in the centre of the tread, not on the inside edge.

Tires were rotated as per the service specification. But service 2 also requires a tread inspection and this wear would definitely be noticeable by anybody paying attention.
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#5 (permalink) Old 09-29-2009, 03:08 PM
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I didn't measure tread depth, but the rest of the tires are nowhere near the wear indicators. (FYI 2.4 cm is about an inch. 3/32" is 2.38 mm)

The wear on the edge is very dramatic. It does not look like normal uneven wear at all. The tires just seem to go from normal to bald about two inches from the inside sidewall.
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#6 (permalink) Old 09-29-2009, 05:12 PM
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I didn't measure tread depth, but the rest of the tires are nowhere near the wear indicators. (FYI 2.4 cm is about an inch. 3/32" is 2.38 mm)

The wear on the edge is very dramatic. It does not look like normal uneven wear at all. The tires just seem to go from normal to bald about two inches from the inside sidewall.
That kind of wear sounds like it came from something rubbing on the tire, like maybe a part of the fender sticking out, or a mud guard?

Are you able to upload a picture? It sounds like a real dramatic difference in wear that might not be caused by alignment. I would expect an alignment issue to show a more gradual blend in the uneven wear between worn/new parts of the tire. Was the suspension allowing the tires to be pushed up so far they hit the fender inside? (maybe that would mean you had to be dragging the axles on the ground )
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#7 (permalink) Old 09-29-2009, 05:20 PM
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I can try to get a picture when it is light. As for the tires rubbing...you would think that would be noticeable.

There was no indication in driving the car that there was a problem, other than some minor shaking in the steering wheel around 65 mph. It went away once we got up to cruising speed (about 70). The car tracked straight and there was no noise from the suspension or anywhere else. Plus, the load really was not anything exceptional. If I was guessing I would say maybe 800 lbs total, including passengers, luggage, etc.
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#8 (permalink) Old 09-29-2009, 09:52 PM
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My Kumho's were showing more wear on the outer 2 tread ribs,mostly when on the front. Then,around 28,000 miles,I noticed wear on the very edge of the inner tread on all the tires. By 31,200 miles,I'd seen enough & put a set of HanKook Optimo 727's on. At their first rotation (36500),the front tires had inner wear. Toe-in reset,& gas mileage has gone up 1.0 mpg minimum & wear looks even @ 39080. The Hankook's ride NICE,& hydroplane less than any tire I've ever had(including Mich HyroEdge,GY Triple Tread),have ''100,000 mile'' treadwear warranty. They are a 'luxury car' tire & ARE soft feeling. Not 'handling' tires. But,I love their bump absorption/smooth-no vibration ride. And if they last over 50,000 miles looking decent,I'm happy.
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#9 (permalink) Old 09-30-2009, 12:41 AM
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All my tires are also wearing on the inside edge. Mostly on the rear though. When I had them rotated at 22000km, rear tires were 8/32 over most of the tire and down to 6/32 on inside edge. Had the alignment checked but it was in spec.. I had noticed it and had to point it out to the tech before he saw it. I'm guessing that your tires have been wearing for some time and the tech just missed it on the last service. My theory is that the wear is because the rear wheels are running with negative camber all the time and it's probably worse loaded.
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#10 (permalink) Old 09-30-2009, 02:21 AM
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DKP

It would be interesting to know what size of wheels & tyres you have fitted. I have 15 inch wheels with 205/65 Hankooks and these have worn evenly across the width of the tread. They have not been rotated (not recommended in the UK for radial ply) and after 23 000 miles I have 3 mm on the front set and 4 mm on the rear. The UK legal minimum tread is 1.6 mm but I wouldn't let them wear that far before changing them. Tests I've seen show that braking distances in the wet start to increase significantly when the tread depth reaches around 2.5 mm. I had planned to leave it another month or so but our local dealer has a 30% promotion on Vredestein Quatrac 3s which are an all season tyre suitable for Scottish roads/climate so I'll be changing them in the next few weeks. On my previous car - a Fiat Multipla - I managed around 30k miles between sets so I suppose I would have managed 25k with the Carens had I not grabbed the promotion and that's okay I suppose given the extra weight and power of the car.

I did have a tracking problem on the Fiat which caused the inner tyre to wear much faster (not noticed until it was too late to save the covers) but why your rear covers have worn in this way is a mystery to me unless you have inadvertantly overloaded the car.

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