Flybikes Sierra 3 Frame (Sergio Layos signature) material: japanese seamless 4130 CrMo top tube length: 21,4 inch head tube angle: 75 degrees head tube length: 113mm seat tube angle: 71 degrees chainstay length: 13,6 inch bottom bracket height: 11,75 inch standover height: 8,75 inch headtube: compatible with integrated headsets (45/45) | offset thickness bottom bracket: mid | machined seattube: fits 1 inch seat posts | integrated seat clamp dropouts: 14mm slots | 8mm thick | 2 removable integrated chain tensioners | investment cast downtube gusset: yes toptube gusset: yes tire clearance: fits large tires brake mounts: EBS | removable on chainstays (not included) gyro tab holes: yes color: flat black