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)
Causes of tinnitus include exposure to loud noises, hearing loss, injury to the head or neck, blood pressure and circulation problems. Tinnitus can also be aggravated by stress. Now, some studies are pointing to allergies and Temporomandibular Joint (TMJ) disorder as factors contributing to tinnitus.