FRAME  SIZES S  15" M  17" L  19" XL  21”

ST Seat  Tube  Length  (mm) 381 431.8 482.6 533.4

TT Horizontal  Toptube  Length  (mm)

575 595 615 635

HT Headtube  Length  (mm) 110 110 120 120

HA Head  Angle 67.5° 67.5° 67.5° 67.5°

SA Seat  Angle 72.5° 72.5° 72.5° 72.5°

CS Chainstay  Length  (mm) 420 420 425 425

BB BB  Drop  (mm) 40 40 40 40

A2C Fork  Axle  to  Crown  length 519 519 519 519

LHS Lower  headset  stack 5 5 5 5

140mm  Sweeps  @  30%  sag

Bird  Zero  Geometry

140mm  Sweeps,  extended

130mm  Velvets,  extended 130mm  Velvets  @30%  sag