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 caused by many different factors inside the ear and brain. The fact is that most times we never determine the exact cause of the sound. There are several likely factors which may cause ears ringing or make it worse: noise exposure. wax build-up in the ear canal. certain medications.