I never used them much but I do have a front "race wheel" with oval it rode it on occasion when I needed a spare. I did not notice a huge difference. I do remember some 'bladed' spokes back in the late '80 required some filing of the hub.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk