Q/R Hub Axle Fits most Shimano hubs. Might well fit Shimano copies too. Apologies for the generalisation. Shimano have produced so many models of hub, and so many vintages, it would be rash to claim these axles would fit all their hubs. We are confident that these axles will fit most budget and mid-level Shimano hubs. Less confident about them being Dura-Ace compatible. The M10 axle fits rear hubs. The M9 axle fits front hubs.