Frame COLUMBUS® NIVACROM® ZONA High Quality Asymmetric Double Butted Steel Tubes Handcrafted Silver Welding and Meticulous Finishing *Negative Slope *Size : XS | S | M | L | XL (custom geo available on request) Bottom Bracket Threading : BSA BB 68mm (English) Seatpost Diameter* : Ø 27.2 mm Head tube: External Tapered 1 1/8" (Headset available on request) Weight: 1800g (53cc) *No rear brake hole (Available on request) *No bottle cage mounts (Available on request) Each frame is numbered Handmade in Italy