Many of the jō-stems of Germanic were in fact ī/jō-stems that go back to ablauting iH/ieH-stems of Proto-Indo-European. The Germanic wō-stems go back to PIE uH/ueHstems with parallel ablaut behaviour to the iH/ieH-stems. Whereas the suffix variant in -ū has nowhere been preserved as such in Germanic, some traces of ablaut and accent variation remain in the Germanic wō-stems. Some such traces were first identified by Kroonen (2013); in this paper, the authors present a more detailed collection of the evidence for ablauting uH-stems in Germanic.