Earlier, it was mentioned that proper fitting of a bike is extremely important. Do not be ignorant and believe that any bike size will do for you. In fact, before you invest in a bike of this magnitude, you should do some measuring beforehand. One of the most efficient ways of determining what frame size is ideal for you is to measure the inside of your leg. Do so in centimeters to make the process easier.
Once you have achieved this value, go ahead and multiply it by 0.65. Now, with this brand-new number, you can look to see how close it is to the manufacturer sizes. Again, multiple size options should be available and select the one that is closest. For example, if your target value is 54.4 centimeters, select the size that is closest (for example 54 centimeters).