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.
My tinnitus began about 6 weeks ago. For seven months prior to that, I had daily headaches. The headaches were never properly diagnosed; a neurologist chalked them up to stress. In truth, I have been experiencing a great deal of stress in my work life, so this seemed reasonable. One day in mid April, I woke up with my usual morning headaches plus something new - loud tinnitus. The chronic headaches never came back, and now I am stuck with the tinnitus. The two are clearly related, When a particularly bad bout of tinnitus dies down, it morphs into a headache. Sometimes, I have both at the same time, and they both seem to originate in the same part of my head (lower forehead).