How to Choose Your Bike Size [ The Simplest Way ]

Bikes are a lot of fun, but figuring out the right size for you can be tricky. Do you need a small, medium, or large bike?

What about a road bike or mountain bike? What’s the difference, and which one is right for you? Check out our easy-to-follow bike size charts to find the perfect bike for your needs.

Whether you’re a beginner just starting out or an experienced cyclist looking for a new challenge, we’ve got you covered!

To find the correct sized bike you will need to measure your height. To get an accurate measure, stand against a wall and mark the wall with a pencil so it’s level with the top of your head. Then measure from the ground up to the mark. That’s it, simple as that.

Now let’s find your bike size for each type:

Road Bike Size Chart

Road bikes come with different frame shapes – compact, semi-compact, and traditional. After the shape, you have to find your size.

Riders’ Height	Size ( Inches )	Size
4’10’’ – 5’2’’	47cm – 48cm	XX-Small
5’2’’ – 5’6’’	49cm – 50cm	X-Small
5’3’’ – 5’6’’	54cm – 53cm	Small
5’6’’ – 5’9’’	54cm – 55cm	Medium
5’9’’ – 6’0’’	56cm – 58cm	Large
6’0’’ – 6’3’’	58cm – 60cm	X-Large
6’3’’ – 6’6’’	61cm – 63cm	XX-Large

Mountain Bike Size Chart

The easiest way to find your mountain bike size is to measure your height. Many riders find themselves between sizes. Choosing to go up or down is a personal preference. Keep in mind that bigger bikes have a longer wheelbase which means more stability on high-speed descents.

Height	Size ( Inches )	Size
4’10’’ – 5’2’’	13’’ – 14’’	X-Small
5’2’’ – 5’6’’	15’’ – 16’’	Small
5’6’’ – 5’10’’	17’’ – 18’’	Medium
5’10’’ – 6’1’’	19’’ – 20’’	Large
6’1’’ – 6’4’’	21’’ – 22’’	X-Large
6’4’’ – 6’6’’	22’’ – 24’’	XX-Large

Hybrid Bike Size Chart

Height	Size ( Inches )	Size
4’10 – 5’2’’	13’’ – 14’’	X-Small
5’2’’ – 5’6’’	15’’ – 16’’	Small
5’6’’ – 5’10’’	17’’ – 18’’	Medium
5’10’’ – 6’1’’	19’’ – 20’’	Large
6’1’’ – 6’4’’	21’’ – 22’’	X-Large
6’4’’ – 6’6’’	23’’ – 24’’	XX-Large

Kid’s Bike Size Chart

Height	Age Range	Suggested Wheel Size
Up to 3’’	Under 2 years	Balance Bikes
3’ – 3’5’’	2 – 4 years	12’’
3’5’’ – 3’9’’	4 – 7 years	14 – 16’’
3’9’’ – 4’5’’	7 – 10 years	18 – 20’’
4’5’’ – 5’	10 – 13 years	24’’
5’+	13 years +	26 – 27.5’’

BMX Bike Size Chart

Height	Age	Size ( Inches )
3’7’’ – 4’0’’	5 – 7 years	16’’
4’0’’ – 4’10’’	7 – 11 years	18’’
4’10’’ – 6’4’’	11+ years	20’’

Please note that frame sizes from XXS to XXL don’t have the same meaning for every bike brand. Sometimes you will need some additional measurements like the inseam.

Here you have a nice bike size guide by Amazon with inseam in mind.