Youth Sizes Feature (Junior - Expert XL):

10mm drop outs 
1-1/8" integrated head tube for use with 1-1/8" or 1" forks. For 1" forks use a "step-down" headset.
Threaded Euro bottom bracket shell (68mm).
Internal Cable routing allows the cable to run entirely through the frame to eliminate splitting your cable housing and to improve the aesthetics of the frame....because looks are important at this level.

Junior Top Tube 18.5″
Head tube angle: 73 degrees
BB Height:: 10.6″
Rear center: 13.5″
Seat tube angle: 70 degrees
Head tube spec: Integrated 1-1/8″ (can use 1 1/8" and 1" forks; for 1" fork, please use step-down headset)
Seat tube spec: 22.2mm
BB spec: Euro
Expert Top Tube 19.25"

Head tube angle: 73 degrees
BB Height:: 11″
Rear center: 14″
Seat tube angle: 70 degrees
Head tube spec: 1-1/8″ (can use 1 1/8" and 1" forks; for 1" fork, please use step-down headset)
Seat tube spec: 22.2mm
BB spec: Euro

Expert XL Top Tube 20″
Head tube angle: 73 degrees
BB Height:: 11″
Rear center: 14″
Seat tube angle: 70 degrees
Head tube spec: 1-1/8″ (can use 1 1/8" and 1" forks; for 1" fork, please use step-down headset)
Seat tube spec: 22.2mm
BB spec: Euro