We usually don't pay attention to our wheel's bolt pattern that often but it is an important thing to know since every car has a different bolt pattern. The wheel bolt pattern is the number of lug ...

Wheel bolt-circle diameter is the diameter of a circle drawn through the centers of the wheel's mounting-bolt holes. Whether shopping for new wheels or scrounging wrecking yards for good used ones, ...

Not all chainrings fit all cranksets. Most chainrings mount via a four- or five-arm ‘spider’ (the arms/spokes on the crankset). The spacing between these arms differs based on the intended gear range ...