The Air 9 RDO is specifically intended as a geared racing bike. With this in mind we referred to the purposeful lines of the Air 9 Carbon but reduced diameters and trimmed profiles throughout. Compared to the CYA bottom bracket shell of the Air 9 Carbon, the smaller PF30 shell of the Air 9 RDO suggested smaller junctions and negated the need for an alloy insert. The rear brake mount is tucked inside the curving stays to distribute twisting forces evenly, permitting smaller caliper mounts and decreased wall thicknesses. Even the headset races in the headtube are molded carbon - we shaved grams wherever we found them. The net result? A 1125g Niner frame that is going to knock your socks off.