Road Bike Sizing Guide – All You Need to Know For The Correct Fit

Riding a bike is a great but simple way to have fun outdoors in many different settings. It is easy to learn (most of us did as children) and not easily forgotten. We will show you the perfect road bike sizing for anyone.

But there are a lot of things that we didn’t learn about biking when we were children and still don’t know that can help us both when it comes to equipment and technique. One of those things is about road bike sizing and how to get your bike to fit you properly.

The Various Size Frames

Bikes are made in a huge range of sizes as well as styles which means they can accommodate anyone from the youngest child to seasoned professionals. There are two ways a bike is sized, with the frame size and the size of the wheels.

The problem is, knowing the correct size to buy can be kind of tricky but making sure you buy the correct frame size is of utmost importance. This is because the when the bike fits correctly you will be more comfortable and more efficient and therefore it will be more fun to ride.

The frame is the foundation of your bicycle. Nothing about it is superficial except its paint. It is the strength and beauty is your bike. So when you’re buying a bike, you need to know about the size of bikes and the material the frame is made of in order to get a frame that will fit you and your primary purpose for riding.

Where Do You Start?

There are standards to help you determine the right size but they are only meant as a starting point. You should also know that though companies generally follow similar rules for bike sizes the geometry is often different making the bike fit a little different.

To help you get the proper size you should know both your height and inseam measurement. to measure your height.

To measure your inseam take your shoes off and put something hard like a book between your legs with an upward pressure like sitting on your bike and then have a friend measure the distance from the top of it to the floor. This will give you your inseam measurement.

Bike Frame Measurement Table

Now looking at the chart below you can see the size frame you should look at buying.

Road Bike Sizing Standard

HeightInside LegFrame Size
5’1″ – 5’3″27″ – 29″48cm
5’3″ – 5’5″28″ – 30″50cm
5’5″ – 5’7″29″ – 31″52cm
5’7″ – 5’9″30″ – 32″54cm
5’9″ – 5’11”31″ – 33″56cm
5’11” – 6’2″32″ – 34″58cm
6’1″ – 6’3″33″ – 35″60cm
6’3″ – 6’5″34″ – 36″62cm

As I mentioned at the start the tire sizes also play a role in both the size and fit of your bike. Now you may find lots of opinions around on the internet about 700C vs 650C road bike wheels.

They try to tell you the benefits of one size over the other when it comes to a rider’s size and aerodynamics but around where I live unless you are a youngster all adult road bike use 700c rims and tires. The only exception might be if you are dealing with a vintage bike.

Getting The Right Fit

Even when you get the size of your bike right there are still some things you will need to do to get it set up right for you. This is called fit and if the bike doesn’t fit you right you will be exerting yourself more than you need to and you will not be as comfortable as you could be.

To get it to fit right you will have to move the seat up or down and forward or back to make these adjustments. Having the right handlebars and adjusting them as well is also a part of getting your bike to fit you right. This is because we are all different physically and the bike needs to be made to fit us personally.

Conclusion

So as you can see there is a lot to knowing about road bike sizes and getting them to fit us right but when it is set up correctly you will be able to enjoy your ride to the max. I hope our road bike sizing review helped answer your questions.

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John is the founder of OutMag and loves nothing more than some downhill mountain biking, river kayaking, and just the challenge of the great outdoors. He is at home on both land and water and is massively into survival and preparedness, hiking and camping.

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