15inch 17.5inch 19inch 21inch

Top Tube Effective 22.5in/ 572mm 23.6in/ 600mm 24.5in/ 622mm 25.5in/ 648mm
 
Seat Tube Length 15in/ 381mm 17.5in/ 445mm 19in/ 483mm 21in/ 533mm
 
Head Tube Angle 70.5° 70.5° 70.5° 70.5°
 
Seat Tube Angle 73° 73° 73° 73°
 
BB Drop 2in/ 50mm 2in/ 50mm 2in/ 50mm 2in/ 50mm
 
Chainstay Length 17.7in/ 450mm 17.7in/ 450mm 17.7in/ 450mm 17.7in/ 450mm
 
Head Tube Length 4.5in/ 115mm 4.9in/ 125mm 5.3in/ 135mm 5.9in/ 150mm
 
Fork Length 17.7in/ 450mm 17.7in/ 450mm 17.7in/ 450mm 17.7in/ 450mm
 
Fork Offset 2in/ 48mm 2in/ 48mm 2in/ 48mm 2in/ 48mm
 
Wheel Base 42.5in/1078.7mm 43.6in/1107.2mm 44.5in/1129.6mm 45.8in/1162.4mm