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CORRECT FRAME SIZE
When selecting a new bicycle, the correct choice of frame size is a very important safety consideration. Most full sized
bicycles come in a range of frame sizes. These sizes usually refer to the distance between the center of the bottom bracket
and the top of the frame seat tube.
For safe and comfortable riding there should be a clearance of between 25mm and 50mm between
the groin area of the intended rider and the top tube of the bicycle frame, while the rider straddles the
bicycle with both feet flat on the ground.
The ideal clearance will vary between types of bicycles and rider preference. This makes straddling the frame when off the
saddle easier and safer in situations such as sudden traffic stops. Women can use a men’s style bicycle to determine the
correct size women’s model.
The following chart and diagram will help you make the correct choice. Rider leg length refers to approximate pant inseam.
PART 2 - BEFORE YOU RIDE
Approximate Rider Leg
Length
61-69cm / 24-27 inches
66-76cm / 26-30 inches
71-79cm / 28-31 inches
76-84cm / 30-33 inches
79-86cm / 31-34 inches
81-89cm / 32-35 Inches
86-94cm / 34-37 inches
Suggested Frame Size for
Racing/Touring Bicycle
-
-
50cm / 19.5 inches
55cm / 21.5 inches
57cm / 22.5 inches
60cm / 23.5 Inches
63cm / 25 inches
Suggested Frame Size for
Mountain or Hybrid Bicycle
37cm / 14.5 inches
43cm / 17 inches
45cm / 18 inches
50cm / 19.5 inches
52cm / 20.5 inches
53-56cm / 21-22 Inches
58-60cm / 23-23.5 inches
Frame Sizing Guide
25-50mm