With switching wheels the weight loss is felt in a couple different ways: Overall weight On a bike that only weighs, let's say, 28 lbs (12,700g) a loss of .9 lbs (410g) is about 3% savings.
A single exposure to a sudden extremely loud noise can also cause tinnitus. A variety of other conditions and illnesses can lead to tinnitus, including: Blockages of the ear due to a buildup of wax, an ear infection, or rarely, a benign tumor of the nerve that allows us to hear (auditory nerve)
Cause of Tinnitus: Muscle Spasms. Hi @VaR - I'm sorry to hear about your whooshing sounds. For what it's worth, you and I both seem to suffer from very similar sinus/Eustachian tube issues, and when I bend my head over, I, too, hear a slight quiver in my ear that comes and goes pretty quickly.