Height
Inseam (optional, makes it more exact) Inseam = inside leg. From the floor to the crotch, in bare feet. It’s not the inseam on a jeans label.
Stand against a wall, pull a book up between the legs like a saddle, mark its top edge and measure down to the floor. Step by step →
Your inside leg: floor to crotch, in bare feet.
Type of bike
Start withL56–58 cm frame
Your inseam points to L: your legs are long for your height, and the frame has to fit your legs.
M also fits. Your height alone says M. It’s shorter and nimbler, with a lower top tube.
How we worked it out
- Height 5′9″ (175 cm)M band, 170–178 cm
- Inseam 33″ × 0.66555.7 cm frame: L
Saddle height and standover
- Saddle height to start29.1″ from the centre of the cranks to the top of the saddle (inseam × 0.883)
- StandoverAbout 2.5 cm (1″) of clearance over a level top tube, 5 cm (2″) over a sloping one
Under 4′10″ (148 cm)Most adult frames start at 148 cm.
Use the kids’ bike size chart: it sizes by inseam and wheel size.
Enter your height to see a size.
Sizing by gearsizing.com, from the brands’ published size charts.