Adult Bike Sizing Guide

Choosing The Right Size:

Adult bike sizes are normally referenced by frame size. Children’s bikes are usually referenced by wheel size.
A frame is measured from the top of the seat tube (where the seat post fits into the frame) down to the centre of the bottom bracket axle (the axle which carries the pedal cranks).  
With the correct frame size you should be able to sit on the saddle with your feet on tip-toes touching the ground on either side, and you must be able to reach the handlebars comfortably.

It is sometimes worth considering a smaller frame with the saddle raised slightly in order to obtain a more comfortable reach.

The sizing charts below give a guide to bike sizes against inside leg measurements. The correct way to measure your inside leg is from your crotch to the floor making sure that your feet are flat on the ground.

Adult size guide by frame size to inside leg measurement:


Frame Size  Inside Leg Range 
 14"  24"-29"
 15"  25"-30"
 16"  26"-31"
 17"  27"-32"
 18"  28"-33"
 19"  29"-34"
 20"  30"-35"
 21"  31"-35"
 22"  32"-37"
 23"  33"-37"


Youth/Teenage by frame size to inside leg measurement:


Frame Size  Inside Leg Range 
 14"  24"-29"
 16"  26"-31"
 17"  27"-32"
 19"  29"-34"
 20"  30"-35"


3 to 9 years by frame and wheel size to inside leg measurement:


Frame Size Wheel Size Typical Age Inside Leg Range
 N/A  12"  3+ Years  13-16"
 N/A  14"  4+ Years  16-20"
 11"  18"  6+ Years  19-22"
 11"  20"  7+ Years  20-23"
 13"  20"  7+ Years  22-25"
 14" suspension  24"  9+ Years  24-27"