Finding your road bike size is easy with just a couple of measurements: Your height Your inside leg length Once you have these numbers, use the bike size calculator on each bike's product page to find your perfect fit.

While road bike styles vary, the approach to sizing remains the same— measuring a rider’s height and leg length and then using a calculator or a road bike size chart to determine the right frame size.

Road bike sizing is based mainly on rider height. Measure your height accurately and check out the useful road bike size chart below. Height isn’t the only metric, though; these other factors can help you fine-tune your bike fit: Choose by leg inseam Some manufacturers provide bike sizing recommendations according to leg inseam.

In fact, nearly every adult road bike, whether it’s a racing bike, an endurance road bike, a cyclocross bike, or a gravel bike, uses one of two wheel sizes –– 700c (28”) or 650b (27.5”). The same holds true for electric road bikes. Most often, road bike frame sizes are expressed in centimeters (cm).

While most adult bikes are sized by the frame, specifically by the seat tube length, sizing standards can differ slightly based on bike types. For example, road bikes are typically measured in centimeters (cm), mountain bikes are measured in inches (in), while hybrid bikes may use either of the two.