There is a size range for bicycles. The perfect bike frame size mainly depends on your height and leg length, but nothing on gender. Regardless of riding style or experience, every rider should have a comfortable bicycle that ensures a joyful and safe outdoor activity. It is why significant bicycle manufacturers design bicycles of different sizes.
Everyone's height, leg length are different. However, most bike frames can be slightly adjusted with the seat's height, the distance of the handlebars to match your most comfortable riding posture. Choose the correct bike frame size based on your height, and then slightly adjust the seat, faucet, and handle correctly.
The frame is the soul of bicycles, especially for road bikes. The appropriate frame size determines whether you are riding happily. If the frame size is too large or too small, it will affect your riding posture, causing you to feel more tired than others and may cause sports injuries for a long time. We created this bike sizing guide to get an idea of what size bicycle may be the best fit for you.
Bike Frame Size Guide
Finding the right bike can be a challenge nowadays. Whether you will buy a mountain bike, a road bike, or an electric bike, the correct frame size is one of the most important keys to determining which one is perfect. Choosing the bike frame size depends on the type of bike, height, riding style, and personal preference. A correct fitting bike will be more comfortable, more efficient, and more fun to ride. The choice usually starts with height. The following are different size charts by height, all data is for reference only.
Road Bike Frame Size By Height
|Rider Height||Suggested Road Bike Size|
|Feet & Inches||Centimetres||Frame Size (cm)|
|4'10" - 5'0"||148cm - 152cm||XX-Small (47cm - 48cm)|
|5'0" - 5'3"||152cm - 160cm||X-Small (49cm - 50cm)|
|5'3" - 5'6"||160cm - 168cm||Small (51cm - 53cm)|
|5'6" - 5'9"||168cm - 175cm||Medium (54cm - 55cm)|
|5'9" - 6'0"||175cm - 183cm||Large (56cm - 58cm)|
|6'0" - 6'3"||183cm - 191cm||X-Large (58cm - 60cm)|
|6'3" - 6'6"||191cm - 198cm||XX-Large (61cm - 63cm)|
Mountain Bike Frame Size By Height
|Rider Height||Suggested Mountain Frame Size|
|Feet & Inches||Centimetres||Frame Size (inches)||Frame Size (cm)||Frame Size|
|4'10" - 5'2"||148cm - 158cm||13" - 14"||33 - 37||X-Small|
|5'2" - 5'6"||158cm - 168cm||15" - 16"||38 - 42||Small|
|5'6" - 5' 10"||168cm - 178cm||17" - 18"||43 - 47||Medium|
|5'10" - 6'1"||178cm - 185cm||19" - 20"||48 - 52||Large|
|6'1" - 6'4"||185cm - 193cm||21" - 22"||53 - 57||X-Large|
|6'4" - 6'6"||193cm - 198cm||23" - 24"||58 - 61||XX-Large|
Kid's Bike Frame Size
Kid’s bikes are scaled-down versions of adult bikes and are typically measured through wheel sizes. Since child riders all grow at different speeds, the best way to find the right bike frame size for kids is to look at models within their age range and then match their height to the right bike.
|Rider Height||Suggested size|
|Feet & Inches||Cms||Inside Leg (min)||Age Range||Suggested Wheel|
|up to 3"||up to 90cm||under 2 years||Balance Bikes|
|3' - 3'5"||90cm - 105cm||40cm||2 - 4 years||12"||12" wheel Kids' Bikes|
|3'5" - 3'9"||105cm - 118cm||46cm||4 - 7 years||14-16"||14-16" wheel Kids' Bikes|
|3'9" - 4'5"||118cm - 135cm||53cm||7 - 10 years||18-20"||18-20" wheel Kids' Bikes|
|4'5" - 5'||135cm - 150cm||62cm||10 - 13 years||24"||24" wheel Kids' Bikes|
|5'+||150cm+||69cm||13 years +||26-27.5" & 700c||26-27.5" & 700c wheel Kids' Bikes|
How To Choose the right Bike Frame Size
Measure your height
To find the correct sized bike you will need to measure your height and your inside leg.
- Stand against a wall and mark the wall with a pencil at the top of your head for your height. Then measure from the ground up to the mark. Having someone to help might make this easier.
- Stand barefooted or wear socks on the ground with your legs spread apart for your inside leg measurement. Use the tape measure to find the distance from the floor to your crotch. It might be easier to get a friend to help.
- If your height is on the cusp of the size range, your reach is often the deciding factor in which size to go for.
The type of bike
What type of bike you choose will affect the bike size you buy. The type or style of riding will also affect which size you need. For example, a mountain biker may want to ride more aggressively and would like a smaller bike than it would typically take. A cross-country rider looking for a flatter and speedier mountain bike may prefer a size larger than they would typically take. There is no absolute right or wrong size. It all comes down to personal preference and what feels comfortable.
Measure The seat tube
You can find a size label on the bottom of the seat tube first. The seat tube is the long tube that the bike seat post sticks into. While not all bicycle frames have a size label, it will save your time if yours does. This measurement is generally from the center of the bottom bracket or the center of the bolt that attaches the crank arms. Most regular-sized bikes have a seat tube length around 21–23 inches (53–58 cm).
Mountain bikes are either measured in inches or descriptive sizes (small, medium, etc.). Road bikes are in centimetres or descriptive sizes.
Stand Over height
If you bought a bike whose seat tube was the same length as your inseam, you would have difficulty pedaling the bike. Ideally, there is at least 2cm of clearance between you and the frame. You could multiply your inseam length by 0.7 to get the right seat tube length.
Different bicycle types have slightly different frame designs. We always recommend that you go to the store to select and check the measurement of the bike personally. It is also necessary to consult experienced staff in bike stores.