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@SideshowBob
There's a lower profile type which has a more rounded top and it was intended for track-only bikes i.e. without brakes. If you look in the old catalogues you can see the difference. I don't think you can use brakes with those because the rim isn't deep enough to accommodate a brake block on the side of it. I have a feeling your new ones might be those.
Oh that's a shame @Jonny69, I will find some other Fiamme rims and compare them with the wheelset, You could be right.
Thanks very much for recommended tubs, I'll take a look at those and the links to the tyre treads are great.