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road cyclists on Specialized S-Works

Road Bike Size Guide

Choose the right size road bike with our bike size guide. The right size road bike will be more comfortable and more efficient so you can ride quicker.


What size road bike do I need?

Choosing the right road bike makes a real difference. This is because a good fit will mean that you will be more comfortable as you cycle, the handling will be easier and you will be able to ride more efficiently. In this guide, we will explain road bike sizing and how you can use our size chart to get the perfect road bike fit.

Choosing the right size bike is easy. All you need to do is measure your height and use our Road Bike Sizing Chart to find out which size bike will fit you best.

Road cyclists on a Cube road bike in Cube clothing

How are road bikes sized?

Road bikes are usually sized either in centimetres or with a general size like medium or large. It is the frame size that determines road bike sizing. 

Classically, frame sizes are based on the length of the seat tube, measured from the centre of the front chain ring to the top of the seat tube. Compact road bike frames, with a sloping top tube, will either show a measurement based on a classic frame or a general size like small or medium. 

Sizes will vary slightly between manufacturers.


Road bikes are measured using seat tube length


How do I choose the right size bike?

All you need to do to choose the right size road bike is to measure your height and then use Road Bike Size Chart below.

Measure your height

Take your shoes off and stand on a flat surface next to a wall with your legs together and shoulders back.

Place a pencil on your head holding it horizontally, make a little mark on the wall and measure the distance from there to the floor.

Measure your height for bike size

Typical Road Bike Sizing Chart

Frame Size

XXS (44)

4'8"

 

5'1"

XS (48)

5'1"

 

5'4"

S (51)

5'4"

 

5'7"

M (54)

5'7"

 

5'10"

L (56)

5'10"

 

6'0"

XL (58)

6'0"

 

6'3"

XXL (60)

6'3"

 

6'5"

XXXL (62)

6'5"

 

6'9"




Which road bike should I choose if I am between sizes?

Our bike sizing chart will sometimes recommend two different sizing options. This means that both the larger and smaller sizes recommended will be suitable for you. The one you choose comes down to personal preference but, if you are unsure, the general rule of thumb is to go for the smaller size option.

This is because it is easier to make a small bike bigger (by raising the saddle height and/or fitting a longer stem) than it is to make a large bike smaller.

Male and female road cyclist on gravel road

For model specific sizing please check the product page.

Please note all sizing information is to be used as a guide only. This is because bike sizes can vary for different brands and models. If you are unsure which size bike will be best for you, our bike specialist team are here to help. Call us on 01792 3465601, chat with Live Help or email info@tredz.co.uk and we will be happy to assist you.

Road Bike Sizing Table(Click to expand)

Height

Size

4’8”  |  143cm

44 (XXS)

 

 

 

 

 

 

 

4’9”  |  145cm

44 (XXS)

 

 

 

 

 

 

 

4’10”  |  148cm

44 (XXS)

 

 

 

 

 

 

 

4’11”  |  150cm

44 (XXS)

 

 

 

 

 

 

 

5’0”  |  152cm

44 (XXS)

 

 

 

 

 

 

 

5’1”  |  155cm

44 (XXS)

48 (XS)

 

 

 

 

 

 

5’2”  |  158cm

 

48 (XS)

 

 

 

 

 

 

5’3”  |  160cm

 

48 (XS)

 

 

 

 

 

 

5’4”  |  163cm

 

48 (XS)

51 (S)

 

 

 

 

 

5’5”  |  165cm

 

 

51 (S)

 

 

 

 

 

5’6”  |  168cm

 

 

51 (S)

 

 

 

 

 

5’7”  |  170cm

 

 

51 (S)

54 (M)

 

 

 

 

5’8”  |  173cm

 

 

 

54 (M)

 

 

 

 

5’9”  |  175cm

 

 

 

54 (M)

 

 

 

 

5’10”  |  178cm

 

 

 

54 (M)

56 (L)

 

 

 

5’11”  |  180cm

 

 

 

 

56 (L)

 

 

 

6’0”  |  183cm

 

 

 

 

56 (L)

58 (XL)

 

 

6’1”  |  185cm

 

 

 

 

 

58 (XL)

 

 

6’2”  |  188cm

 

 

 

 

 

58 (XL)

 

 

6’3”  |  191cm

 

 

 

 

 

58 (XL)

60 (XXL)

 

6’4”  |  193cm

 

 

 

 

 

 

60 (XXL)

 

6’5”  |  196cm

 

 

 

 

 

 

60 (XXL)

62 (XXXL)

6’6”  |  198cm

 

 

 

 

 

 

 

62 (XXXL)

6’7”  |  201cm

 

 

 

 

 

 

 

62 (XXXL)

6’8”  |  203cm

 

 

 

 

 

 

 

62 (XXXL)

6’9”  |  205cm

 

 

 

 

 

 

 

62 (XXXL)


Can I use the bikes size calculator for women’s specific road bikes?

Yes, typically women’s specific road bikes have a different frame geometry to unisex bikes but they are sized in the same way.

Women tend to have shorter upper bodies to men so women’s specific road bikes tend to have a shorter top tube than unisex bikes. As this doesn’t affect the seat tube length Our road bike size chart is suitable for both unisex and women’s specific bikes.


Female cyclist on a Liv womens specific bike

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