Alston pro link wheelie bars feature a new wheel bracket that is stronger and lighter than previous models. A unique design, the wheel bracket solves the problem associated with the lower ride heights of today's cars by providing greater bumper clearance. These bars also use a new ball bearing castor with urethane instead of rubber for better wear. The new tubular design with simplified mounting makes these wheelie bars very light and strong. Plus a new aluminum adjuster specifically designed for these bars, keeps weight to a minimum.