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.
Sinus infection or lesions can lead to headaches with tinnitus. Sinus related conditions leading to inflammation of the mucus membrane can also manifest typical ringing sounds in the ear or the head. These sinus conditions can bring on a generalized headache and sounds in the ear, sometimes followed by fever as well.
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.