DRC Wheel Chock Moto Binding - Black/ RedDRC Wheel Chock Moto Binding SPECIFICATIONS: Innovative style tire chock. May be used for pit bikes to full size dirt bikes. (Accepts 8 to 21 inch wheels.) Maximum tire width : 130mm (5. 2 inch) Folding design saves space. (Height is 135mm ( 5. 4 inch) when folded.) Accepts mini wheels (Up to 12 inch) even while it is folded. Self lock function prevents arm from openning up unexpectedly from folded position.