How to Measure the Frame Size of a Bike

Measuring the frame size of a bike is very important to feeling comfortable when riding it. Many people face problems when finding a bike that fits them properly and allows for maximum pleasure and less effort required in just handling the bike alone. Depending on your height, there are numerous bikes available in the market and consulting an expert in the field is the way to go, but if you want to do it yourself and get a bike that is a perfect match, than there are a few things you could try.

How to measure the frame size of a bike may not always be easy, but can be done by learning time tested methods in order to ensure the best fit.


  • 1

    Know the Basics

    Not all bikes are made for everyone. They come in different shapes and sizes for a reason. Features of a bike are something that improves with the amount of money you spend, but here, you will learn how to measure the frame size of a bike. Usually, if you are 5 feet and 8 inches to 6 feet tall in height, getting a bike that is 18-inches in its frame size is a good fit. This can increases and decrease if you are taller or shorter, respectively.

  • 2

    Bottom Bracket

    The cylindrical component located at the bottom of the bike where the pedals usually are connected to the body of the bike is known as the bottom bracket. This place is essential when trying to measure the frame size of a bike and should always be taken as the first step in doing so.

  • 3

    Measuring Frame Size

    Taking some measuring tape, measure the length of the seat tube from the center of the bottom bracket to the top of the seat tube. This will give you the size of the bicycle’s frame size quite accurately. If your measurement ends up in millimeters, than you can easily convert it into inches as one inch is equal to approximately 25.4 millimeters.

  • 4

    Not a Final Answer

    Always remember, measuring the frame size of a bike is not a guaranteed way of knowing whether that specific bike will be a good fit or not. It is definitely a useful guide in starting off, but ultimately, the feel of the bike when sitting on it and actually riding it will give you the best answer. Always make sure that the seat should be adjustable, and be adjusted to your comfort when buying it.

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