The Right Frame Size for You

The best frame size for a cyclist is as small vertically as possible, with enough length horizontally to allow a stretched out, relaxed upper body. This frame will be lighter and stiffer than a larger one, and will handle better and be more comfortable than a smaller one.

To determine your proper frame size for an online purchase, you'll first need to get an accurate inseam measurement. Stand with your back against a wall, your bare feet 6" apart on a hard floor, looking straight ahead. Place a book or carpenter's square between your legs with one edge against the wall, and pull it up firmly, simulating the pressure of your saddle while riding. Have a helper measure from the top edge of the book to the floor, in centimeters. (You can convert inches to centimeters by multiplying inches by 2.54. Repeat two or three times, for accurate measurement.

Frame size refers to the length of the frame's seat tubes. Pro frames are measured along the seat tube in one of two ways, Top Tubes or Seat Tubes (see geometry) ST measures the distance from the center of the bottom bracket to the top of the top tube or seat lug. Since ST usually measures to a point higher on the frame, a 55cm ST would roughly be a 53.5-54cm. To size your ST road frame, we use a guideline of .67 x inseam length. For example, if you have an 85cm inseam, your ST frame size would be .67 x 85cm, or 57cm.

Quick Size Guide

Apart from being a pro bike fitter yourself and taking into consideration the dozens of factors and varying frame sizes, riding position, compact vs regular frame size - this is our snappy little system that will get you started. Order your new bike today and pick up your bike at the shop to get the full fitting!