Just today I have replaced the worn directional tires with some new Precedas and the road noise seems much the same

I thought it may be front wheel bearings so bought some to replace them myself, but when I jacked the front end and spun the wheels the bearing seem quiet
Is this to be expected? Could they be quiet with no weight on them yet get noisy when the wheels are on the ground?
There might be some increased noise when turning right (loading left front) but it is not what you would say is significantly different from turning left
Would appreciate some advice before I go to the hassle of replacing the bearings
Josh