Bicycle Wheel Size How To Measure. A guide on how to measure both height and inseam length will be covered later in this post. Common bike sizes range from 48 cm 62 cm.
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The wheel size is based on the diameter of the tire see below and as each tire size gets larger so does the size of the bicycle frame. When your bike is in an upright position you ll easily measure the size of the bike without the bike tipping onto you. To measure a bicycle wheel start by standing the bike upright by leaning it against a wall or using the kickstand.
Next multiple the radius by 2 to get the diameter.
Switching from 630 to 622 for example needs another 4mm of brake reach. Bike frame sizes are measured in the same way for all styles of bicycle. 12 inch 16 inch 20 inch and 24 inch. This can also be in inches or millimetres.