How to Measure Bike Frame Size

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How to Measure Bike Frame Size

Determining the correct frame size for your bike is essential for the optimal cycling experience. Whether you’re considering purchasing a new bike or upgrading your current bike, knowledge of your frame size is key for finding the perfect fit. The following guide will provide you with step-by-step instructions for measuring your frame size.

Step 1: Choose the Appropriate Bike

Before you can determine your frame size, you must decide on the type of bike you would like. This decision is largely based on the type of riding you plan to do. Common types of bikes include mountain bikes, road bikes, hybrid bikes, cruiser bikes and BMX bikes. Each type of bike is designed for a specific style of riding and will have certain features such as a different frame design or brake system that make the bike better suited for its intended purpose. Consider all your cycling needs before making a finalized decision.

Step 2: Take Critical Measurements

Once you’ve decided on the type of bike you’d like to purchase or upgrade, it’s time to begin taking measurements. You will need to measure your inseam and stand-over height. To measure your inseam, stand with your feet slightly apart and measure the distance from the floor to your crotch. To measure your stand-over height, measure the distance from the floor to the top of the top tube (or top bar) on the bicycle.

Step 3: Compare Measurements to Frame Size Chart

With your measurements in hand, you can refer to a frame size chart to determine the appropriate size frame for you. Most manufacturers provide such charts and they are also often available online. The frame size chart will provide you with a range of frame sizes, listed in inches for mountain bikes and in centimetres for road bikes. Check your measurements against the range of sizes provided on the chart and select the size frame that best matches your measurements.

Step 4: Consider Additional Factors

Before making a final decision on your frame size, consider some additional factors, such as your reach and riding style. Your reach is the distance from the tip of the saddle to the handlebars. If you find that you’re straining to reach the handlebars, a larger frame size may be better suited to your needs. Additionally, if you plan on doing any stunts or jumps, then a larger frame size may be a better option to give you more stability while in the air.

Step 5: Test the Frame Size

Once you’ve determined the most suitable frame size for your bike, it’s a good idea to test it out before making the purchase. Most bike stores will let you take a test ride on the bike so you can determine if the frame size is right for you. While you’re test riding the bike, ensure that you’re feeling comfortable in the saddle and that your reach is satisfactory. If you have any doubts about the frame size, it’s best to speak to a bike store expert for advice.

Step 6: Make the Purchase

If everything feels good with the frame size, then you’re ready to make the purchase. Once you’ve made the purchase, ensure that you take the time to properly adjust the seat, handlebars, brakes and other components to ensure that you’re getting the most out of your riding experience. After you’ve done this, you’re ready to start enjoying your new or upgraded bike!


Measuring bike frame size is a simple process that can be done using a few basic tools and a frame size chart. Knowing your frame size is essential for finding the perfect bike to suit your needs and provide you with an optimal riding experience. Follow the steps outlined in this guide to accurately measure your frame size and get your bike ready for the open road.

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