Hope pro 4 rear hub wear
There are no circlips securing the bearings on the axle tube. The QR endcaps should be held in the axle by their o-rings. If these have been allowed to move apart (e.g by an inadequate or loose skewer), the overall width of the knurled surfaces that contact the frame will be more than 135mm. Assuming no damage to the endcaps or axle, pushing these back in should be enough.