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)
My tinnitus began about 6 weeks ago. For seven months prior to that, I had daily headaches. The headaches were never properly diagnosed; a neurologist chalked them up to stress. In truth, I have been experiencing a great deal of stress in my work life, so this seemed reasonable. One day in mid April, I woke up with my usual morning headaches plus something new - loud tinnitus. The chronic headaches never came back, and now I am stuck with the tinnitus. The two are clearly related, When a particularly bad bout of tinnitus dies down, it morphs into a headache. Sometimes, I have both at the same time, and they both seem to originate in the same part of my head (lower forehead).