C10 ultra high-modulus carbon disc-only frame w/ shaped top tube for portaging, integrated tapered head tube w/ 1 1/2" lower, oversized 34.9mm round seat tube, PIIS BB86 shell, double water bottle mounts. Rear triangle: C10 ultra high-modulus carbon seatstays w/ post-mount disc tabs, oversized chainstays and carbon dropout w/ replaceable hanger