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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.

Height (feet & inches)

Height (cm)

Frame Size (inches)

Frame Size (cm)

General Sizing

4’8” – 5’1”

143 – 155cm

13"

44cm

XXS

5’1” – 5’4”

155 – 163cm

15"

48cm

XS

5’4” – 5’7”

163 – 170cm

16”

51cm

S

5’7” – 5’10”

170 – 178cm

18”

54cm

M

5’10” – 6’0”

178 – 183cm

19”

56cm

L

6’0” – 6’3”

183 – 191cm

20”

58cm

XL

6’3” – 6’5”

191 – 196cm

21"

60cm

XXL

6’5” – 6’9”

196 – 205cm

22"

62cm

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

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

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.

For model specific sizing please check the product page.


Road bikes are measured using seat tube length