There is one other answer, IF the alignment is right and the tires do not have a belt that is mis-alligned (thats generally is the cause of radial pull) and the springs were installed correctly you could have a bad tie rod end or lower ball joint or even an upper shock mount that is loose.

Tie Rods and Ball joints are the last place to look for a pull, it’s common for these parts to get a wear pattern, when you lower a car you change the angle of these components and the wear pattern becomes more pronounced and can cause odd front end behavior, especially when you lower a vehicle. Lowering a vehicle is hard on the suspension and sometime will exaggerate an existing problem.

Again this is the very last possible place you should look, it’s more likely you have alignment problems, tire problems, a caliper sticking or a bad wheel bearing before a joint problem.

Good luck