Originally Posted by
oneclick
They were marginally better in the rain than plain steel ones.
Interestingly at least one manufacturer also made aluminium rims with serrations - Akront.
Weinmann made a few, evidently. I recall the 210 but learned there were also knurled tubular rims.
My memory of serrated steel rims in the rain is the song of the brake pads against the flats as I zoomed ever closer to doom at speed only slightly diminished.