Note: This item will not be fit with the Manual Tire Changer, nor the warranty not being covered. It is a tapered head about 25mm-28mm. Features and Benefits: For Coats Tire Changers Larger Channel For Difficult Wheels Perfect Design: tire machine parts designed for low-profile tires, the mounting head has larger access for difficult-to-mount wheels and is designed for easy mounting of low-profile tires. .