Wheel balance problem

[240novice]

After rotating tires, I think I have a wheel balance problem. I checked the pressure of tires, but my 240SX doesn't go straight unless I firmly hold the steering wheel. It slowly tends to go left. How can I solve this problem? Do I have to go to a mechanic shop? Thanks.

[s13sr20chris]

my friend that is not a balance problem. it is either alignment or more likely a tire issue. swap the tires around again. if the pulling follows the tire then its def tire prob.

[240novice]

Thanks, s13sr20chris. I didn't have this problem before rotating tires. Do I have to do tire alignment whenever I rotate tires? What kind of tire problem do you mean?

[s13sr20chris]

an alignment should not (in theory) be affected by tire rotation. however, in reality all four tires are not identical and it will be effected. i would just get an alignment once in a while as preventative maintenance. a tire problem could be one tire worn more that the others or of a different type than the others. other probs could be internal failures of different parts of the tire that may not be perceptible to your eye.