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How To Measure Bike Frame

By: Esther Lowery

Break Studios Contributing Writer

Trying to find the right size bike for yourself and want to know how to measure a bike frame? Determining the right measurement for your bike size will help you be more comfortable while riding your bike. Having you seat sitting too high or low or having your handlebars too far out or forward can all affect the ride of your bike. It is important you learn how to measure your bike frame to get the best benefit from cycling.

To measure a bike frame correctly, you need:

  • Bicycle
  • Measuring tape
  1. Put the bike in a stable position. Make sure the bike is stable and positioned straight upward. You can either place the bike on a kickstand or against a wall to keep it in a stable and secure position for an accurate measurement.
  2. Identify the bike frame parts of the seat tube. The length of the seat tube is the frame's triangle that is located underneath the seat. The "top tube" is the horizontal tube that the bike frame intersects near the seat tube. The "bottom bracket" is a round hole located towards the bottom of the seat tube.
  3. Measure the bike frame size. Now that your bike parts are identified, you can measure the bike frame properly. With your measuring tape, measure from the center of the "bottom bracket" to the top of the rim of the seat tube. This is the measurement size of the bike frame in inches.
  4. Compare your measurements. Use a manufacture's bike sizing chart, which you can find online or in a bike store, to compare your measurements. Make sure that the measurement you have is an actual bike measurement for a bike frame on the chart. If it does not show up on the bike sizing chart you may have to re-measure or covert your measurements from inches to centimeters.
Posted on: Sep. 10, 2010