Measure yourself
You need your height and your inseam (stand against a wall, book between your legs, measure floor to top of the book).
City and trekking bikes
- 155 to 165 cm: size S (48 to 50 cm frame)
- 165 to 175 cm: size M (52 to 54 cm)
- 175 to 185 cm: size L (56 to 58 cm)
- 185 to 195 cm: size XL (60 to 62 cm)
Road bikes
- 160 to 168 cm: 50 to 52 cm
- 168 to 176 cm: 54 cm
- 176 to 184 cm: 56 cm
- 184 to 192 cm: 58 cm
Mountain bikes
- 160 to 170 cm: S
- 170 to 180 cm: M
- 180 to 190 cm: L
- 190 cm and up: XL
Kids bikes
Kids bikes go by wheel size, not frame size. 16" for 4 to 6 years, 20" for 6 to 9, 24" for 9 to 12. Inseam matters more than age, the chart on each kids bike page shows the minimum inseam.
Every bike page also has a size calculator that uses your height and inseam.