With a metal ball and socket and u bolt clamp the motor was designed for quick mounting and angle adjustments on a handlebar or roll cage motor fits tubes from 050 to 125 127mm to 3175mm in diameter a heavy duty ball and socket system allows for infinite adjustment to get the perfect angle for the ultimate shot hitcase motor mount uses motocross downhill mountain biking atv racing snowmobile riding motorcycle racing with the hitcase39s patent pending railslide sys