No, it is Columbus Cromor tubing
I am trying to use the frame, recently purchased, wasn't expecting the stays to have such a narrow clearance.
Am avoiding to buy a new frame for the sake of a few mm. Ideally I would like to use these rims also recently purchased, which I am aware are quite MTB-ish.
It is a lot of effort yes but the built would be perfect if wasn't this little-big issue.