alright, so i talked to a couple tread-quarter guys, and was told that most likely the tires are 'chopped' and wear uneven (from front to back). they said theres nothing unsafe about this as long as i don't feel any vibration or bad tracking, which i don't - the car is still smooth riding and tracks evenly - that everything is fine and that a rebalancing and alignment won't solve the 'tire roar'. I also assume that the Ford dealer that did my service (even though i've had problems with this particular dealer) would have noticed any unsafe conditioning of the tires. the multi-point inspection showed good/acceptable tread life.
I'll give them some time to see if the wear becomes more even and the noise subsides. if not, i'll use this as an excuse to get some new performance oriented tires
, as the Primacies seemingly can last for almost forever but don't have a lot of grip IMO...
Heres a close-up pic:
all the tires look similar.
Has anyone seen this type of wear before?