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.
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.