Cooper STT pulling left?

[nspdx]

I have a set of Cooper stt tires for a bit over a month. I went from 285 in Hercules trail digger tires to 315 cooper stt. Immediately they pulled hard left. I had them cross switched the next day, then waited a while to get other mods done before finally having it aligned. I have had it aligned 4 times, numbers show that it should drive straight. Also, I had all tired cross switched between 1st and 2nd alignments, still pulls left. Has anyone else had cooper stt tires pull left or right for an unidentified reason?

Have you had another new tire pull in a particular direction? I'm wondering if it is a problem with vehicle/tire compatibility. It was fine before and wih new tires it is now pulling. I have heard of this happening sometimes.

 

[T rex80]

Are you going to the same wheel alignment shop each time. Mine pulled left after a wheel alignment by a well known company over here so i took it to a company who specialises in truck and 4wd alignment and they fixed it first time, the guy said the toe was set incorectly. Might be worth shopping around.

 

[mazder]

I could trade you my 285 BFG AT's Load range E if it makes you feel better, they only have about 2000 miles on them not including the spare. LOL.

 

[landtoy80]

If you switch tire sides and it still pulls to the same side then I am willing to bet its not the tires.
Did you switch front to rear and left to right in a cross method?

I had a Toyota dealer do my alignment couple times and finally had to have a local shop do the alignment. It would go straight till I hit a small pot hole and it would be out again. Toyota dealer said that a small pot hole will take out the alignment in a Toyota Truck. If thats true then we should have to align out 80's after each 4x4 trip.

Try another shop.
OR
Pull the wheel and see if the brakes are hanging up. Check for loose/worn bearings or other damage.