Frog Bikes Sizing

In contrast to many kids' 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.

Frog Bikes Size Guide

Once you have measured the inside leg, use this table to find the right size of bike for your child. Note Frog Bikes 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.

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).

Tadpole Mini24cm1-210"  
Tadpole31cm (12")2-312" 
Tadpole Plus38cm (15")3-414" 
Frog 4343cm (17")3-414"9"
Frog 4848cm (19")4-516"9.5"
Frog 52s 52cm5-620"10"
Frog 5252cm (20")5-620"10"
Frog 5555cm (22")6-720"11"
Frog 6262cm (24")8-1024"12"
Frog 6969cm (27")10-1226"14"
Frog 7373cm (29")12-1426"16"
Frog 78 78cm (31")13+ 26" 18" 
Frog Road 58 / Track 5858cm (23")6-720"11"
Frog Road 67 / Track 6767cm (26")8-1224"14"
Frog Road 70 / Track 7070cm (27")11-1426"17"
Frog MTB 6262cm (24")8-1024"12.5" 
Frog MTB 69 69cm (27")10-1226"15"
Frog MTB 72 72cm (28") 13+ 26" 16"