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.
1 Tinnitus can be an early indicator of Meniere's disease, an inner ear disorder that may be caused by abnormal inner ear fluid pressure.  TMJ disorders. Problems with the temporomandibular joint, the joint on each side of your head in front of your ears, where your lower jawbone meets your skull, can cause tinnitus.