How to Measure Inseam for Bike

Bike riding is popular among people of all ages sizes and gender. In the past, there weren’t many choices for bike variety or size. But now the growing demand for bikes has caused bike manufacturers to produce bikes with different sizes, models, etc. And the right size is really important for a comfortable and safe ride. How to measure inseam for bike no one wants a bike that doesn’t suit him/her, as it spoils all the fun. That’s before bike purchase everyone should check if their body height and other parts are compatible with a particular bike or not. Especially this problem arises. Online shopping, as it doesn’t let you check physically and you’ve to purchase based on the given information on the bike’s website. In that case, if you know the inseam of your body, it’ll get much easier to get the right bike even through online purchases.

How to Measure Inseam for Bike

What is Inseam?

Generally, inseam refers to the maximum distance between a person’s ankle and inner thigh. This measurement is essential for a bike rider to drive safely. It determines the extent to which you can be comfortable with the seat while paddling. While purchasing a bike, people usually compare their inseam with the frame of the bike. But here we’ll tell you how you can check your comfort with other parts of the bike as well.

How to Measure Inseam?

Measuring inseam is really simple and easy. Here’s how you can do it:

  • Take off your shoes.
  • Stand up and lean your back opposing a wall and expand your legs apart to about 6-8 inches.
  • Put a book (large) up to your spine, between the legs in a position that the book is a bike seat and you’re sitting on it.
  • Ask someone to measure the length from the floor to the book in centimeters.

And the calculated result is your inseam for a bike that’ll suit you perfectly.

Measure Different Part with Your Body

Now you know how to measure the inseam for a bike. Though that’ll work for you to get a correctly sized bike. Still, you can check other parts with your body to be entirely sure about the satisfaction of future commutes


The way we’ve already told you about measuring your inseam, that result will be needed to get the perfect frame size. Remember that you’ve to calculate the inseam in centimeters then multiply that with 0.65, and the result will be your approx. Road frame size. And if you want the result in inches, divide the multiplied result by 2.54. Also, for mountain bike’s frame, you’ve to subtract 10-12 centimeters from the road bike’s frame size.

"Frame"How to Measure Inseam for Bike


The size or reach to the handlebar can’t be fixed. Because in a different situation, you may require different flexibility. You may feel to have a little angle at the elbow while crossing bumpy roads, and you may not want that while riding on smooth roads. That’s why it’s better to add 2” of spacers under the steerer tube. So that’ you can move and use that according to your need.

"Handlebar"How to Measure Inseam for Bike

Seat Height

Seat height should be in a way so that your knee can slightly bend at the lowest base of the pedal stroke. To measure that, wear your cycling shoes and pedal with your feet. Focus if your belly is shaking while you’re pedaling. Calculate the intervals of the top of the seat and bottom bracket. That’ll be your seat height. The result should be the nearest calculation of your inseam multiplied by 0.883.

"Seat Height"How to Measure Inseam for Bike

Gear Placement

The gear reach should be in a way that, while paddling, maximum power transfers from your feet. It’s better to concentrate while changing gear to the first couple of rides. Then you can figure out if the gear placement is okay or not.

"Gear Placement"How to Measure Inseam for Bike

Final Words

Everything depends on which type of bike you want, and what’s the purpose. Because different bikes such as road, mountain, hybrid, etc. have different measurements. The same calculation won’t fit for all of them. That’s why decide first what you want. Also, there’re different frame sizes for kids and female bikers. And if you haven’t bought a bike before and going to purchase the first one, it’s better to buy that from a physical shop instead of an online purchase. In that way, you’ll be safe from buying the wrong size as you don’t have any prior experience.

Bike Size Chart (Road Bike)

Height (ft./in)

Height (cm)

Suggested Frame Size



148-152 cm

47-48 cm



152-160 cm

49-50 cm



160-168 cm

51-52-53 cm



168-175 cm

54-55 cm



175-183 cm

56-57-58 cm



183-191 cm

58-59-60 cm



191-198 cm

61-62-63 cm


Bike Size Chart (Mountain Bike)

Height (ft./in)

PriceHeight (cm)

Leg inseam (inches)

Leg inseam (cm)

Suggested Frame Size (in)

Suggested Wheel Size

4’10 –5’3″


25 – 28″

62-70 cm

13 – 14″


5’4 “- 5’7”


25 – 30″

63 – 76cm

15 – 16″


5’5″ – 5’9″

165 – 175cm

26 – 31″

66 –78 cm

16 – 17″


5’9″ – 6’0″

175 – 183cm

27 – 32″

68 – 81 cm

17 – 18″


6’0″ – 6’3″

183 – 190cm

28 – 33″

71 – 83 cm

18 – 19″


6’1″ – 6’6″

190 – 200cm

29 – 34″

73 – 86 cm

19″ +


Bike Size Chart (Hybrid Bike)​​​​

Height (ft/in)

Height (cm)

Leg Inseam (in)

Leg inseam

Frame Size (Inches)

Frame Size (Marker) *


147-155 cm

24 – 29”

61–73 cm




155-165 cm

25 – 30”

63 – 76 cm




165-175 cm

26 – 31”

66 – 78 cm




175-183 cm

27 – 32″

68 – 81 cm




183-191 cm

28 – 33″

71 – 83 cm



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