2 x 8, 16 Speed, 24x1 (25-520 iso) Wheel Size, Presta Valve Inner Tubes, M13II Sun Rims, Sora From & Rear Derailer, Sora Hubs (Front & Rear), Sora Brake Calipers, Sora Flight Deck Shifters (Front & Rear), 16 in (40 cm) Seat Tube , 03 in(7.5 cm)in Head Tube, 17 in (43 cm) in Top Tube, 13 in (33 cm) in Chainstay Length, 16 in(40cm) Stack Height, Great for a small adult 4'11 (150 cm) and below.