This beautiful Mosaic RS-1 was put together by Above Category in California. Anyone that has concerns that a steel bike just can’t get light enough should have those concerns put to rest here. Mosaic have hit the perfect balance of keeping the ride quality of steel, and making a frame that can be built up light enough to be a climbing bike – Mosaic’s do come from Colorado after all. Chad and the team at AC have had this frame built up to be sitting between 13lbs – 14lbs, and that is not with any stupid light carbon parts – it was still an everyday ride. The frames come standard with the well respected Enve fork and Chris King headset. The frame geometry is custom as is also the bottom bracket. The AC builds are always beautifully spec’d and finished and I think this one has to be one of my favorites.