I have the same problem. Pulls to the right and follows the tracks in the road. I have 15 inch rims and 31 inch BFG all-terrainTA Tires inflated to 36 PSI all the way around. It does not seem to matter which way the crown of the road is going it will just pull right. I have to get an alignment every 3 months or it will get bad. Several shops have looked at it and they say everything is ok mechanically.