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FROG Children's Bikes Sizing Guide

Choosing a FROG child’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).