If your scooter or quad requires a 90 degree stem, it probably won't fit, even if it's "super short". After you screw it in, it still sticks out about an inch outside the inside of the wheel. Even with this short version of Colby valves on wheels, where the valve hole is in the center of the wheel, this product obviously points directly to the hub or center of the wheel, and many wheels do not have enough space to install this. I had to grind down the fat end just to install it because on my…