Bike Frame Size Measurement

Most bikes use one of these three sizes of wheels.
Bike frame size measurement. First consider what kind of bike you want sizing varies greatly between road and mountain bikes as well as between men s and women s models and even between. Road bikes are in centimetres or descriptive sizes where as hybrid bikes can be any one of the three. To calculate your bike frame size take your inseam in centimeters and multiply it by 0 575 for mountain bikes 0 665 for road bikes and 0 645 for trekking bikes. Buying a bike in the correct size means it will be more comfortable and enjoyable to ride and you ll also reduce the risk of picking up an injury.
Simply use our vintage bike sizing chart below to find the perfect fit for you. The bike size is usually on a sticker somewhere on the frame. If you look near the bottom of this tube about 3 inches 7 6 cm up from the chain sprocket you ll see a glued on label that states the bike s frame size. You can have two bikes with the same frame size but differing stand over height.
Mountain bikes are either measured in inches or descriptive sizes small medium etc. Of course this measurement is up to each brand s interpretation ridley s size s frames have a top tube around 54cm which is equivalent to many brands size medium frames. The below is a typical bike size guide however due to different bike types we d recommend using out bike size guides above to find your specific bike size frame and understand how to measure the bike frame correctly. Consider the bike type.
The seat tube is the long tube that the bike seat post sticks into. Bikes also get longer as they go up in size relative to the frame size but different brands can be inherently longer or shorter than others. Alternatively use our handy bike frame size calculator at the top of this page to figure out which bike frame size you need. This guide will help you to understand the measurements you need to pick the right sized bike frame for you no matter what your cycling discipline.
Bike size guide chart. Classic bike frame sizes are measured in inches and are available in sweeping open frame style designs in a choice of frame sizes.