Re: Prop question: how can you tell pitch? Or if the hub is spun? Home › Forum › Ask A Member › Prop question: how can you tell pitch? Or if the hub is spun? › Re: Prop question: how can you tell pitch? Or if the hub is spun? XR55US Member - 2 YearsReplies: 310Topics: 30 April 24, 2018 at 3:35 am #74627 Measure the prop on a pitch gauge. Some times there will be damage on the back side of the hub, a whole lot of grooving or scoring as the drive pin spins by the hub.