SIZE xSmall (14) Small (16) Medium (18) Large (20) xLarge (22) Head Tube Angle 71 71 71 71 71 Head Tube Length 90 100 110 125 145 Seat Tube Length 355.6 406.4 457.5 508.8 558.8 BB Drop 40 40 40 40 40 Wheelbase 1011.9 1037.3 1062.6 1083.2 1098.8 Chainstay Length 419 419 419 419 419 Top Tube Length, Actual 532 549 570 590 608.3 Top Tube Length, Effective 546 571 596 616 631 Seat Tube Angle 73 73 73 73 73 Standover Height 717 745 774 804 838