Attacco: Velomann ST92A +/-7°, 1.1/8", diam.31.8mm, ext: 80mm-15/17" and 90mm-19/21", 3D forged alloy 6061; Piega:Velomann rise MTB479A, width 720mm, diam.31,8mm, rise 15mm, backsweep 9°, PG Alloy 6061 sandblasted anodized