Problems with 2002 Lexus SC 430 TIRES

I own a 2002 lexus sc430 which has bridgestone potenza runflat tires on it. i put on a new set of tires 1 year ago and 17,000 miles late, the vehicle is all over the road, tires wear excessively on the insides, and i've had it aligned about 3 times in that 1 year. a friend of mine had the same vehicle and he had to get rid of it for the same problem. the tires become very noisy and it sounds like all the wheel bearings are bad. the local dealership is trying to tell me that this high performance tire only lasts 10,000 miles, but when i brought the car to an alignment expert at another repair shop, he stated that is is definitely an alignment problem with the car and that there was plenty of tread life left on the rest of the tires. upon further researching this on the http://lexusownersclub.com, i found out that many of the sc430 owners are experiencing the same tire wear/steering problem and that the car was built with a negative camber and that puts more wear on the tires. please look into this widespread problem as it does greatly affect the steering and safety of the vehicle. we are unable to drive it on the open highway for this problem and the lexus company is blaming the problem on the potenza tires. thanking you in advance for your timely assistance on this. *jb

Bridgestone potenza runs flat-sidewall failure-run flat feature failed ruining wheel, bubble appeared on sidewall of 2 tires. *la

I own an "02 lexus sc 430..with run flat tires. the tires pull badly when running on uneven ground..sometimes the pull is so bad you must hold the wheel firmly or you can lose control of the car. it is not safe. my wife is afraid to drive this car. the service advisor at 2 dealerships told me that is normal for run flat tires. i went to a tire dealer..he told me the same thing. these tires are not safe..and should be investigated by your agency. *nlm

While in motion and in inclement weather, the vehicle went into a 360* spin, while moving at only 25 mph. the vehicle lost all traction. the brakes on the vehicle are inoperable. while on an incline and braking from about 5 mph the vehicle jumped an island before the brakes stopped it. *jg

About a year ago i bought a 2002 lexus sc 430 hardtop convertible. the tires had to be replaced at 11,000 miles because the inside tread was cupping and making horrendous growling and vibration noise. i called lexus and the factory rep came out and talked to me and said they all do the same thing and the problem can't be fixed. i could not see the problem and the tires looked perfect until you removed them and examined them. my worry, apart from the $2,000.00 to replace the tires is that the vibration of the tire at high speed could cause a failure. i feel that lexus knowingly sold a car with an inherent defect in the steering which could cause serious harm if not fixed. lexus gave me a new set of tires but i don't believe they should get a pass on this. *ak