Sub 10 / 20 / 30 / 40
Frame Size X-Small Small Medium Large Extra Large
Seat Tube Center-Top 13.9 14.7 16.3 17.9 19
Effective Top Tube 21.5 21.9 22.3 22.7 23.3
Standover 28.3 28.9 30 31.3 32.3
Head Tube 5.3 5.7 6.3 6.9 7.7
Chainstay 18 18 18 18 18
Head Tube Angle (degree) 69.5 70.5 71 71.5 72
Seat Tube Angle (degree) 73.5 73.5 73 72.5 72.5

Sub Solution 10 / 20 / 30 / 40
Frame Size Small Medium Large Extra Large
Seat Tube Center-Top 13.4 14.3 15.9 17.1
Effective Top Tube 21.3 21.7 22.2 22.8
Standover 28.4 29.1 30.4 31.4
Head Tube 6.1 6.5 7.3 8.1
Chainstay 18 18 18 18
Head Tube Angle (degree) 70 70.5 71 71.5
Seat Tube Angle (degree) 73.5 73.5 73 72.5

Sportster P3
Frame Size Small Medium Large Extra Large
Seat Tube Center-Top 18.5 20.1 21.7 23.2
Effective Top Tube 21.7 22.2 22.8 23.4
Standover 29.6 30.4 31.2 NA
Head Tube 4.3 4.9 5.5 6.1
Chainstay 17.7 17.7 17.7 17.7
Head Tube Angle (degree) 69 70 71 71.5
Seat Tube Angle (degree) 74 73.5 73 73

Sub 20
Frame Size Small Medium Large Extra Large
Seat Tube Center-Top 18.3 19.8 21.4 22.4
Effective Top Tube 21.7 22.2 22.8 23.2
Standover 28 29.2 30.4 31.5
Head Tube 6.1 6.9 7.7 8.1
Chainstay 16.9 16.9 16.9 16.9
Head Tube Angle (degree) 69.5 70 70 70.5
Seat Tube Angle (degree) 73.5 73 73 73

Sportster P4 Lady
Frame Size Small Medium Large
Seat Tube Center-Top 17.3 18.9 20.5
Effective Top Tube 20.9 21.5 22
Standover 26.1 26.3 26.5
Head Tube 4.7 5.1 5.5
Chainstay 17.7 17.7 17.7
Head Tube Angle (degree) 69 69.5 70
Seat Tube Angle (degree) 74 73.5 73.5

Sportster P55 / P5 Lady
Frame Size Small Medium Large Extra Large
Seat Tube Center-Top 18.5 20.1 21.7 23.2
Effective Top Tube 21.7 22.2 22.8 23.4
Standover 30 31.2 32.3 33.5
Head Tube 4.3 4.9 5.5 6.1
Chainstay 17.7 17.7 17.7 17.7
Head Tube Angle (degree) 69.0 70.0 71.0 71.5
Seat Tube Angle (degree) 74.0 73.5 73.0 73.0

*Measurements stated in inches unless otherwise indicated.


How to Size Your Bike

  1. With shoes on, measure from your crotch to the floor. This gives you your inseam length.
  2. Find the stand-over height on the bicycle sizing chart ("A" in the illustration at right).
  3. For mountain, touring, urban and comfort bikes, the difference between your inseam length and the stand-over height should be around 2 inches; for road bikes, this difference should be around 1 inch.