Have you had the brakes check?

 

This is independent of brakes, whether or not they're applied. And actually, come to think about it, I did get new pads on all four wheels not too long ago.

 

Maybe the right front brake caliper is sticking. Raise it up and see if the wheel spins freely.

 

If the caliper is sticking it will still cause the car the pull to one side without applying the brakes. Sometimes, the car will pull to the opposite direction when braking, is that happening to your car?

Just one area you can look at if you have already had the alignment checked and found nothing wrong there.

 

if you have any wore out steer components it will cause this too. check tie rods and wheel hubs for play. they probably arent lying. on an alignment rack, they can get the specs perfect, but if on the road the tire wont stay pointed in the straight direction then it will cause a pull. Its more common for vehicles to pull to the right, since roads are sloped to the right, and thats a good indicator that you have a worn component. but yes, also brakes can cause that pull too. either way you need to jack the car up and start spinning the wheels and pulling on them. make sure everything feels correct and uniform throughout

 

I've got a slight pull on both my cars too, but I know its not an alignment issue. Its due to tire pull.

Sometimes rotating the tires will make it worse, as a bad tire from the back could now be on the front wheel. Your options are not to play with the wheel combinations, including your full sized spare, to see what combinations reduce the severity of the pull. If push comes to shove, you'll have to get a pair (or a set) of new tires.

 

The first thing I would check is a sticky caliper. Hard pulling that is not related to tires or an alignment is almost always due to this.

You could simply look for lots of brake dust after a few days, or just put your hand on the rim after a good long drive. It will be way hotter if the caliper is sticking. In fact, you might not be able to touch it if it's sticking that bad.

After that, it's suspension/steering parts. This should be noticeable at other times though. Clunking noises, harder turning to one side vs the other, bumps being worse on one side vs the other, etc.

You didn't post the year or brake options, but if it's rear disc brakes, the parking brake shoes (there is an integrated drum inside the rear rotors) could also be sticking.

 

I wonder if the OP ever found a resolution to his problem.

 

I wonder if the OP ever found a resolution to his problem.

I wonder also. I hate when there is a post for a problem and never finishes to tell the cause.