When is an alignment necessary?

[BigJnSA]

I have a 97 Mountaineer and just had the 235/75's replaced with some BFG A/T 31x10.50x15. They fit fine, but looked a little "stuffed" so I bought the $20 Autozone shackle kit and did a TT for about 3/4". I know everyone says you need an alignment after doing 1.5 - 2" TT, but is it necessary on one under an inch? It seems to track straight and the steering wheel is still straight. If it means anything, both torsion nuts were rotated the same amount. (4 complete turns)

Thanks in advance!

 

[trj360]

you should probably do one anyway, even if you don't notice any change, it could still be silently damaging your tires and prematurely wearing them out.