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.
Ringing in the ears (tinnitus) can be caused by a number of medications, including some antidepressants. Not all antidepressants cause tinnitus. If your antidepressant is the cause of your tinnitus, switching to another medication may solve the problem, but don't quit taking your medication without medical guidance.