I think Isen mostly use Reynolds and Deda downtubes, but there's only so many combinations of the available tubesets to go around. I'm in the process of ordering another couple of 38mm Spirit downtubes for my next build, and the last one had Max chainstays too.
I think Isen mostly use Reynolds and Deda downtubes, but there's only so many combinations of the available tubesets to go around. I'm in the process of ordering another couple of 38mm Spirit downtubes for my next build, and the last one had Max chainstays too.