That is defintely not normal. I would HIGHLY recommend getting an alignment, and unless you are installing R comp tires (super soft rubber for extra grip), you should get tons of life out of them. FYI, mine are over 15k on them and show no signs of wear.

 

Thanks. I once heard someone say for K900 specifically, due to staggered tire sizes, you should get an alignment every time you replace tires. Do you agree with that advice?

 

Turns out I needed an alignment, got it done, seems like it is doing better, but we'll see. Kia Dealership said to do alignment every 12,000 miles or one year, whichever comes first, but may need to be sooner depending on how rough the roads I drive are (i.e., hitting potholes and what not).

Thanks!!

 

Hope you are fixed up on that problem now, pappy97. It does sound unusual.


I'm about to get new tires for mine, and I was not real happy about it at only 20,000 miles. But you made me count my blessings!


The car is about 5 years old now, although I've only had it three, and I'm thinking it's just dry rot--I'm seeing some cracking in the sidewalls and they don't feel real good in the rain anymore.

 

I have the same issue with my K900. In my 3 years of ownership, I'm getting new rears about every 6 months. My new solution to this is I'm getting rid of the staggered tires. When this set bites the dust, I'll order 2 front 19" wheels and square the setup. Then I will be able to rotate the tires. Yes I know I'll lose a bit of grip for launching, but who cares when the car is 5,000lbs.

 

When I bought my 2015, the tires had maybe half of the tread left. In the past twelve months, I have put 12,000 interstate miles on it and the rear tires are shot, with absolutely no tread left. I will definitely get an alignment, and I am going to probably go to Michelin Primacy tires, as opposed to the Falken tires on it now, as I have previously had two sets that went over 80,000 miles on a Lexus LS450.

 

In 40k miles of driving over 4 years, I've had 1 full set replaced (not out of thin wear but my disgust w/ the OEC Hancook Optimus) w/ Michelin Pilot Spot. In hindsight, didn't have to spring $$ for the Michelins; they're good but there're comparables for 2/3 the money.

The rear got worn down about 20k miles, front still good.

Replaced rear w/ Falken Azenis. Love it. Can't tell any difference w/ having 2 different sets front/rear; though I drive the K900 the way it's designed to be driven (think old lady in Lincoln Towncar).

Even the worst passenger car tires should last >6k miles, so issue has to lie elsewhere. Alignment mostly, as some of you here discover.

With the K900, flat spotting is more prevalent given how heavy the car is. Mine gets driven now and then but can sit a week or more at times w/o being touched.

Incidentally the Hancook turns out to provide the quietest ride, but the worst handling experience (the slightest of wetness can make the car fishtail. I really, really had to drive like an old lady w/ that set).

 

The factory Hancook tires on my 2015 K900 were garbage... likely the worst tires I've had on any car; since 1974. After multiple dealer attempts to road-force balance them, remount them, etc. they finally replaced them (after 5,000 teeth-jarring miles) with a new set of Hancooks. The out-of-balance situation was fixed, but those tires (front and rear) wore out before I had 15k miles on the car (10k on the tires). After much research, I replaced them with Continental Extreme Contact DSW 06 front and rear. These are GREAT tires in every regard... especially on wet roads with heavy standing water. So far I have just under 40k miles on them and there is plenty of tread left. When these wear out, I'll likely replace them with the new DSW 06 Plus versions.

 

I have to keep replacing mine as well. It does no good to buy expensive tires. I paid 1200 for a set of Continentals and they wore out quickly as well. I was also told that having a staggered set is the reason. I buy at least 2 sets a year. Makes no sense. No one can seem to figure out the issue.

 

I also have a 2015 K900 purchased new with "test drive" miles on it. The factory tires were crap, they could not be balanced, regardless of how many times the dealership tried, or how many different ("this tech is our BEST") technicians. They tried load-force balancing, standard spin balance, etc. Finally after 5 thousand miles of having my teeth rattled, the dealership gave me 4 new Hancooks. The out-of-balance situation was fixed, but those tires (front and rear) wore out before I had 15k miles on the car (10k on the tires).

I replaced all four with Continental DSW tires. These were GREAT tires - wonderful in any of the weather conditions we have in Southern AZ. However, the rear insides wore out (almost bald) after 12,000 miles. The dealership checked my alignment (which they said was factory spec) and gave me a good discount on a new pair of tires. 15,000 miles later I picked up a nail in a front tire and took my car to my local Discount Tires for repair. When they lifted the car, the inside 2" of both rear tires were bald.

At their recommendation, I took my car to a high-end shop that services mostly Corvettes, Ferraris, Jaguares, etc. The owner was very familiar the K900 "issues", and told me immediately that the factory spec is strong negative camber on the rear ties, and there is very little adjustment room. The tested my car and found the right rear was at the max negative, and the left rear was beyond (more negative) spec. As he forecasted, they could not adjust it to within spec. They recommended, and I purchased, and aftermarket adjustment kit which allowed them to bring both rear wheels to just a slight negative camber. I was concerned the car might feel less stable on the road... but I see no difference. I also see no difference in treadwear now between the inside and outside of the rear tires.

I needed to put four new Continentals on the K900! That's fours sets of tires in under 50k miles. As 60,000 miles, I just replaced the factory tires on my wifes 2015 Kia Sorento SX V6.

 

Can you please send me information on the aftermarket part you got

 

See the first thing to is change rim size to 18 for front and rear with 235/50 R18 tyre size you will be happy. It will enhance ride quality and the tyre will last longer