The inner tie rods possess an adjustable mechanism to guarantee that the steering wheel is centred. If misaligned, the steering wheel will be off-center. The probable culprit is that one of the rods is somewhat bent, rendering it slightly 'shorter'.This can be rectified through adjustment, namely by gently shortening the opposing side as well. The outcome will be a centralised steering wheel with a little tighter turning radius on one side than the other. The tie rod requires replacement alone if it is visibly bent; a slight bend is OK and can be adjusted as previously mentioned.