Review on Enhanced Colby Valve Ultimate Tire Valve Stem Replacement System - Upgraded Version by Alan Singh

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 scooter, like many ATVs, the valve hole in the wheel is at wheel dead center and there isn't enough clearance due to the hub and brake mechanism. After installing it as in the picture, it was impossible to inflate. If your wheel's valve port is on the side of the wheel, this product should work perfectly.