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.
Trauma: If tinnitus is caused by trauma to the ear it usually is noticed in both ears, because both ears generally are exposed to the same noises, drugs, and other influences. Exposure to loud noise: Loud noise exposure is a very common cause of tinnitus today, and it often damages hearing as well.