I had the first set on my car for nearly 2000 miles. They don't just "go back to round". Besides, if they fail roadforce, they're not going to magically repair themselves - it's a defect.

 

Yeah I returning the hankook v12s. I put about 500 miles on them and still vibrate badly. I took it to another well know tire shop in Atlanta and he said the tires are out of round. I'm not sure if I want to experience with hankook again. I saw a lot of good review on them and few bad one but am I that unlucky to end up with 2 defected on first try?! haha

 

Count yourself lucky, I got 4 bad out of 4. Then another bad one out of the new set. Pretty pathetic quality control imho

 

The fact that you have mismatched tires is irrelevant IMO. I have had mismatches on my E46, SRT8, and mustang. Never had an issue as long as they were balanced. I have had experience with tires that just wouldn't balance properly, and have had good experience with dynamic balancing (Dyna Beads) rather than weights and machine balancing.

 

Well I hope I won't regret my decision but I order a set of Hankook v12 from discount tire. The 550i is my daily driver so I do not really need the best performance tires for it. Reason I gave Hankook another try is because if I am unlucky enough to get more defected tires, I have 30 days to return and upgrade to better tires. For the price of 2 rear conti sport contract 2 is the same price is a set of hankook so I give it one last try and hope I won't regret.

 

Sorry to hear that. You should really reconsider before installing them. Besides the pathetic quality control, the sidewalls on these tires are very soft. They make the car drive more like a Buick than a BMW and that's no joke. They steering feels very numb and the tires provide little feedback to the driver. I'm thinking about just eating the cost and getting a new set of Pilots instead. I mean, I paid good money for BMW handling and performance and these tires truly take away from the pleasure of driving an otherwise fantastic automobile. It's kind of like hooking up Wal-Mart speakers to a Bang & Olufson stereo.....

 

mine are great. but i am running 20"

 

I'm happy with my V12s (245/35F and 285/30R) on staggered 166 rims, so far.

Sorry to hear about your bad experience with the Hankooks. You should post more pictures of your 535i with awesome wheels.

 

Thanks. I'm happy with the wheels, not so much with the tires.

What pressure are you guys using in the V12's? The stock pressure of 33/36 feels very soft to me.

 

I'm running on V12's and never had an issue with them.

However, I used to have a set of unround tyres (other brand), and there is something you can do about it!
Every wheel has their high points and low points even if they seem to be completely round. When the high point (or low point) of the unround tyre settles on the high point (or low point) of the wheel, the combination vibrates. In this case, tell the mechanic to turn the tyre on the wheel 180°, like you turn a steering wheel. This helps the high (or low) points of the tyre and the wheel settle on different spots, and you may get rid of vibrating. I've seen this done and experienced that it sure helps!

- Antti -