Welcome to Square Wheels
Shopping Basket - £0.00

You have no items in your shopping basket.

01997 421 000

Bike Sizes

The bike size tables below are just a guide, which can help you to choose the right size. Sizes also depend on your personal needs and what the bike is used for. Please call us on 01997 421 000, if you have any questions about bike sizes.

Mountain bike sizing chart (hardtail & full suspension)

Rider Height Frame Size Suggested
Feet and Inches Centimetres Inches
4' 10" - 5' 2" 148 - 158 13 - 14
5' 2" - 5 '6" 158 - 168 15 - 16
5' '6" - 5' 10" 168 - 178 17 - 18
5' 10" - 6' 1" 178 - 185 19 - 20
6' 1" - 6' 4" 185 - 193 21 - 22
6 '4" - 6' 6" 193 - 198 23 - 24

 

Women's mountain bike sizing chart (hardtail & full suspension)

Rider Height Frame Size Suggested
Feet and Inches Centimetres Inches
4' 10" - 5' 2" 148 - 158 13 - 14
5' 2" - 5 '6" 158 - 168 15 - 16
5' 6" - 5' 10" 168 - 178 17 - 18
5' 10" - 6' 1" 178 - 185 19+

 

Road bike sizing chart

Rider Height Frame Size Suggested
Feet and Inches Centimetres Centimetres
4' 10" - 5 '0" 148 - 152 47 - 48
5' 0 "- 5' 3" 152 - 160 49 - 50
5' 3" - 5' 6" 160 - 168 51 - 52 - 53
5 6" - 5' 9" 168 - 175 54 - 55
5' 9" - 6' 0" 175 - 183 56 - 57 - 58
6' 0" - 6' 3" 183 - 191 58 - 59 - 60
6' 3" - 6' 6" 191 - 198 61 - 62 - 63

 

Women's road bike sizing chart

Rider Height Frame Size Suggested
Feet and Inches Centimetres Centimetres
4' 10" - 5' 1" 147 - 155 44 - 45 - 46
5' 1" - 5' 3" 155 - 160 47 - 48 - 49
5' 3" - 5' 5" 160 - 165 50 - 51 - 52
5' 5" - 5' 8" 165 - 172 53 - 54 - 55
5' 8" - 5' 10" 172 - 180 56 - 57

 

Hybrid bike sizing chart

Rider Height Frame Size Suggested
Feet and Inches Centimetres Inches Centimetres
4' 10" - 5' 1" 147 - 155 13 - 14 47 - 49
5' 1" - 5' 5" 155 - 165 15 - 16 50 - 52
5' 5" - 5' 9" 165 - 175 17 - 18 53 - 54
5' 9" - 6' 0" 175 - 183 19 -20 55 - 57
6' 0" - 6' 3" 183 - 191 21 - 22 58 - 61
6' 3" - 6' 6" 191 - 198 23 - 25 61 - 63

 

Triathlon and Time Trial bike sizing chart

Rider Height Frame Size Suggested
Feet and Inches Centimetres Centimetres
5' 0" - 5' 3" 152 - 160 49 - 50
5' 3" - 5' 6" 160 - 168 51 - 52
5' 6" - 5' 9" 168 - 175 53 -54
5' 9" - 6' 0" 175 - 183 55 - 56
6' 0" - 6' 3" 183 - 191 57 - 58
6' 3" - 6' 6" 191 - 198 60 - 61

 

Jump and Trial bike sizing

As a general rule Jump and Trial bikes are one size fits all; catering for people from heights of 4' 10" - 6' 4" (148cm - 193cm).

Folding bike sizing

As a general rule folding bikes are one size fits all catering for people from heights of 4' 10" - 6' 4" (148cm - 193cm).

 

BMX bike sizing chart

Rider Age or Height Wheel Size Suggested
Feet and Inches Centimetres Age Inches
3' 7" - 4' 0" 110 - 122 5 - 7 years 16
4' 0" - 4' 10" 122 - 147 7 - 11 years 18
4' 10" - 6' 4" 147 - 193 11+ years 20

 

Children's bike sizing chart

Rider Age or Height Size Suggested
Age Feet and Inches Centimetres  
2 - 5 years 2' 10" - 3' 7" 85 - 110 Runner bikes
2 - 4 years 2' 10" - 3' 4" 85 - 100 12 inch wheel diameter
3 - 5 years 3' 1" - 3' 7" 95 - 110 14 inch wheel diameter
5 - 7 years 3' 7" - 4' 0" 110 - 120 16 inch wheel diameter
7 - 9 years 4' 0" - 4' 5" 120 - 135 20 inch wheel diameter
9 - 11 years 4' 5" - 4' 9" 135 - 145 24 inch wheel diameter
11+ years 4' 9"+ 145+ 26 inch wheel diameter

 

Trailer bike sizing chart

Rider Age or Height Size Suggested
Age Feet and Inches Centimetres  
3 - 5 years 3' 1" - 3' 7" 95 - 110 20 inch wheel diameter
5 - 9 years 3' 7" - 4' 5" 110 - 135 24 inch wheel diameter


CHOOSING A FROG CHILDREN'S BIKE

In contrast to many children's bikes, Frog bikes are sized by the leg length rather than age, as this is the most reliable way of getting the right size of bike for each child. Age alone isn’t a reliable measure as there is a large spread of “normal” leg lengths & heights for each age.

Please take the time to measure the rider’s inside leg. 
It’s easy to measure:

  1. Stand the child in socks against a wall
  2. Place a small book between their legs, as high as is comfortable
  3. Ask the child to move away and measure from the top of the book to the floor, in cm.
Frog size guide image

Once you have measured the inside leg, use this table to find the right size of bike for your child. Note we give the MINIMUM inside leg length for each bike, with the saddle at its lowest setting. At this height, the child will safely and comfortably be able to get their feet on the ground. Don’t worry - Frog Bikes have long seat posts, so the saddle can be raised a long way as the rider grows.

 

 

Minimum inside leg (cm)

Approx age

Wheel Size

Frame Size

Tadpole

34

2-3

12"

4"

Frog 43

43

3-4

14"

9"

Frog 48

48

4-5

16"

9.5"

Frog 52

52

5-6

20"

10"

Frog 55

55

6-7

20"

11"

Frog 62

62

8-10

24"

12"

Frog 69

69

10-12

26"

14"

Frog 73

73

12-14

26"

16"

Frog Road58

58

6-7

20"

11"

Frog Road67

67

8-12

24"

14"

Frog Road70

70

11-14

26"

17"

Of course all children have different length arms and torsos too, so to ensure a comfortable riding position, the handlebar height can be tailored, and saddles can be slid backwards and forwards on their rails. (These adjustments are easy to do and just need an allen key; instructions are in the manual supplied).