Road Bike Size Chart & Calculator

road bike frame with measuring tape

While road bike styles vary, the approach to sizing remains the same— measuring a rider’s height and leg length and then using a calculator or a road bike size chart to determine the right frame size.

The calculator and size chart on this page will recommend a frame size and crank length based on your measurements, including a suggested range of alternative sizes you should try.

Let’s find the right size!

What Size Road Bike Do I Need?

what size road bike do I need

Choosing the right road bike frame size is one of the most important steps you should consider when buying a new bike. Luckily, doing so is easy if you know how.

The first thing you need to do is measure your height and inseam length, which you will then enter into our road bike size calculator below or compare against our road bike size chart.

Check them out!

1. Road Bike Size Calculator

Our calculator is a simple tool that lets you enter your height and inseam length in inches or centimeters and then tells you which road bike size is the best for you. It will also recommend the right crank length, which is an important factor for comfort and performance.

Once you click on “Calculate,” you will be taken to a new page with a printable sheet that you can print out and take with you to a local bike shop.

Enter your measurements below!


Rider Information


   Reset Form

inches | centimeters


Road Bike


2. Road Bike Size Chart

Another way to get the right road bike size based on your measurements is by using a road bike size chart, like the one you see below. 

The road bike size chart below provides a comprehensive guide to help you find the perfect fit based on your height and inseam length.

Rider height Suggested frame size
Feet/Inches Centimeters Effective top tube Frame Size
4'10"-5'0" 148-152 cm 47-48 cm XXS
5'0"-5'3" 152-160 cm 49-50 cm XS
5'3"-5'6" 160-168 cm 51-52-53 cm S
5'6"-5'9" 168-175 cm 54-55 cm M
5'9"-6'0" 175-183 cm 56-57-58 cm L
6'0"-6'3" 183-191 cm 58-59-60 cm XL
6'3"-6'6" 191-198 cm 61-62-63 cm XXL


Frequently Asked Questions

faq road bike sizes

1. What size road bike do I need for my height?

To determine the right size road bike for your height, you should use a calculator or a road bike size chart to get the suggested size based on your measurements. It's best to rely both on your height and inseam length when choosing the right size, in order to get the most precise recommendation. 

2. Is it better to get a smaller bike frame?

If you are in between two sizes, it's generally better to get a smaller bike frame than a larger one because it will be easier to adjust it to fit your body. You can also choose a smaller bike frame if you prioritize performance and you want a lighter bike that will put you in a more aerodynamic position.

3. How do I know if my road bike is too big?

To determine if your current road bike is too big, you should find out what is its frame size, measure your height and inseam length, and use our calculator or road bike frame size chart to find out if it is the right size for you. Moreover, if your bike is too big, you will feel stretched out and experience pains and aches in your neck, shoulders, and hands. 

4. Why do pro cyclists ride small frames?

Many pro cyclists ride small frames because they are lighter than larger frames and because they put the rider in a more aerodynamic position that reduces drag and promotes speed. Pro cyclists can get away with this because of their flexibility, which is why this method is not recommended for recreational cyclists. 

5. Is it better to have a bike too big or too small?

It's best to have a bike that is the perfect size, but if you are in between two sizes on a road bike size chart, we recommend choosing the smaller frame. It's generally easier to fit a smaller frame by using a different stem and handlebar than to do so with a frame that is too big. 

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