Quite sturdy and durable frame. Foldable and intelligent design for easy operation. With a smart compact design, the stand won't take up much space. The measuring part is made of plastic to protect the wheels from scratch. Twist knob to transform the notches. Ruler and thimble for observing the swing condition of your rim. Upper notches to fix front wheels on the truing stand, lower notches to fix rear wheels. Great for the home mechanic as well as the team mechanic to be used on race days. Suitable for 100MM front flower drum drive, 135MM back flower drum drive. Specifications: Condition: 100% Brand New Material: Aluminum Alloy Weight: Approx. 2226g / 78.5oz Size: Approx. 36 x28.5 x 43cm / 14.17 x 11.22x 16.92in Package list: 1 * Bicycle Wheel Truing Stand Note: Suitable tire sizes for this product are 16-29 inch.