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)
Tinnitus may be caused by various drugs, ear disorders, infections, injuries, or psychiatric disorders, but the most common cause by far is loud noise, such as from explosions, gunfire, amplified music, farm machinery, or emergency sirens. Many rock musicians develop tinnitus, and it is common among combat veterans.