Choosing the size of your bicycle

It is very important to choose the correct size when buying a new bicycle. If a bicycle is too small it can feel uncomfortable to ride as it will be very cramped and you may not be able to adjust your saddle to a suitable height for pedalling efficiently.

If a bicycle is too large it can be dangerous to ride as you will not have proper control and may hit the top tube of the frame during an emergency stop. You may also develop strain injuries from being too stretched out when you ride a bicycle that is too large for you.

Please get in contact with us on 01403 258474 or email promotions@freeborn.co.uk if you are unsure of the size you require and require some expert advice!

Children’s bikes

These are generally sized using wheel diameter. It is important to choose a bicycle that fits your child now, rather than buying a larger bicycle for them to grow into, as this can be dangerous for them to ride and may put them off cycling for life.

Age range Wheel size
2-3 years 12”
3-5 years 16”
5- 7 years 20”
7-10 years 24”

Adult’s bicycles

These are generally sized using frame size, with allowances made for different types of bicycle.

Men’s and Women’s bikes also have allowances made for sizing with women’s bikes generally slightly smaller for the same given frame size.

Mountain bikes typically have a smaller frame with more saddle extension to give extra clearance between you and the bicycle frame which makes the bicycle more maneuverable on rough terrain.

Road bikes typically have a larger frame with less saddle extension as less clearance is required between you and the bicycle when used on the smooth road

Hybrid bikes typically fall between mountain bikes and road bikes for sizing, with ‘sport’ road models closer to road bike sizing and ‘multi-use’ (road / off-road) models closer to mountain bike sizing

Men’s mountain bike sizing

Frame size Height Height (cm)
13” 4’10” – 5’2” 152 – 158
15” 5’2” – 5’ 6” 158 – 168
17” 5’6” – 5’10” 168 – 178
19” 5’10” – 6’1” 178 – 185
21” 6’1” – 6’7” 185 – 193
23” 6’ 5” – 6’ 7” 193 – 200

Men’s road bike sizing

Frame size Height Height (cm)
49 cm 5’ 0” – 5’3” 152 – 160
52 cm 5’ 3” – 5’ 6” 160 – 168
54 cm 5’ 6” – 5’ 9” 168 – 175
56 cm 5’ 9” – 6’ 0” 175 – 183
58 cm 6’ 1” – 6’3” 183 – 191
61 cm 6’ 3” – 6’ 6” 191 – 198

Men’s sport hybrid bike sizing

Frame size Height Height (cm)
X-Small 5’ 0” – 5’3” 152 – 160
Small 5’ 3” – 5’ 6” 160 – 168
Medium 5’ 6” – 5’ 9” 168 – 175
Large 5’ 9” – 6’ 2” 175 – 188
X-Large 6’ 1” – 6’6” 188 – 198

Men’s multi-use hybrid bike sizing

Frame size Height Height (cm)
Small 4’ 10” – 5’ 2” 152 – 158
Medium 5’ 3” – 5’ 6” 160 – 168
Large 5’ 6” – 5’ 9” 168 – 175
X-Large 5’ 9” – 6’ 2” 175 – 188
XX-Large 6’ 3” – 6’ 6” 188 – 198

Women’s mountain bike sizing

Frame size Height Height (cm)
13” 4’10” – 5’1” 148 – 155
15” 5’1” – 5’ 4” 155 – 163
17” 5’4” – 5’ 8” 163 – 173
19” 5’ 8” – 5’11” 173 – 180

Women’s road bike sizing

Frame size Height Height (cm)
44 cm 4’ 8” – 5’0” 143 – 152
48 cm 5’ 0” – 5’ 3” 155 – 160
51 cm 5’ 3” – 5’ 6” 160 – 168
54 cm 5’ 6” – 5’ 8” 168 – 173
57 cm 5’ 8” – 5’10” 173 – 178

Women’s sport hybrid bike sizing

Frame size Height Height (cm)
X-Small 4’ 8” – 5’0” 143 – 152
Small 5’ 0” – 5’ 3” 152 – 160
Medium 5’ 3” – 5’ 6” 160 – 168
Large 5’ 6” – 5’ 9” 168 – 175

Women’s multi-use hybrid bike sizing

Frame size Height Height (cm)
Small 5’ 0” – 5’ 3” 152 – 160
Medium 5’ 3” – 5’ 6” 160 – 168
Large 5’ 6” – 5’ 9” 168 -175