[header] How to size a road bike [title] Use your total height and a road bike sizing chart for a basic guideline. [step] Standing against a wall, measure your total height and record it in centimeters, as this is how road bike frames are measured. Through an online search or by borrowing a chart at a road bike store, find the bike height that is associated with your total height. 
Use the chart to find whether you need an extra small, small, medium, large, or extra large road bike frame. [substeps] You can convert your height from inches to centimeters by multiplying it by 2.54.