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 is a ringing or swishing that seems to originate in the ear or head. Causes of tinnitus include loud noise exposure, medications, and other diseases. Treatment options are limited for tinnitus. Tinnitus can be prevented by wearing hearing protection when exposed to loud noises.