USUALLY, it is low tire pressure, RH Front ! COULD be front-end alignment !
Wish you had listed the year make and model of your car so we could let you know all of the conditions that would cause the problem.
Incorrect toe-angle, incorrect camber, incorrect caster adjustment, worn ball joints, worn toe-rod ends and *worn lower control arm bushings will cause the problem. Worn tires or incorrect tire pressure could cause it to a lesser cause.
A frozen brake caliper could also be causing it particularly if the brake fluid has never been changed.
low tire pressure a dragging brake pad or shoe will cause that
other major things are alike alignment suspension parts or steering parts, bad tire, unbalanced wheel
