Nashbar Alloy 29er Mountain Frame. Your 29er blank canvass awaits courtesy of the Nashbar Alloy 29er frame. This svelte hardtail is constructed of 6061 aluminum the industry standard for quality in either mountain or road bike frames. The beauty of 6061 aluminum is that it's tough, light, and can be fashioned to give flex in all the right areas for superior control and riding comfort. The material strikes a nice, happy medium between carbon fiber and steel. The frame is designed for disc brakes only and is equipped to handle either a hydraulic or mechanical disc brake system. All of the cables are routed externally along the top tube for easy maintenance and to better protect them from mud and grime kicked up onto the downtube. This rock solid 29er frame is such a good deal that resistance is futile. Snap one up today and build it just the way you imagined.