2005 RSX Type-S - Bought new tires about 20,000miles ago and now I have irregular wear on all four. On all four inside and outside is way more worn out than the middle part of the tire. Also, in the mid section its wavy, meaning some is worn off then there is ptach not worn off and so on. Alignment is not that bad, very slight. Suspension is 105k miles old.

Any ideas what could be causing this? Is it possible these are defective tires?

 

oem suspension? go check your toe angle. you probably need an alignment.

 

Is your car lowered?...if you lowered it but didn't get a camber-kit, this can sometimes lead to that such problem.

 

check your tire pressure.

 

^^^ I agree with tire pressure. What tires? How are you driving the car?

 

Could be overinflated or too much toe in, usually toe out does not give you the scalloped wear you describe.