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Info & Sizing

Frog are a small British company dedicated to making cycling fun for children. They believe the lighter the bike, the easier it is for children to learn to ride, and to enjoy it more as they progress. Many kids' bikes on the market weigh nearly as much as the child!

The founders, Jerry and Shelley, are a couple who have 2 small children of their own – both keen cyclists. So they know something about what motivates children to get on their bikes! Since the first prototype arrived, the bikes have always been robustly tested by the children and all their friends. Frog is proud to be a family run and owned business. In fact, in 2017 they won the FSB & Worldpay family business of the year award for the south-east region. 

Since summer 2016, Frog have been assembling bikes in UK, in their own factory in south Wales. This is a really exciting development for Frog, and one which will help them be more responsive to the market, reduce environmental footprint, and create jobs in the local economy.

In 2017, Frog Bikes Manufacturing won the Made in Wales Manufacturer of the Year award. This award was in recognition of excellence in manufacturing and an outstanding contribution made to the manufacturing sector. 

How to choose a child's bike

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.

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

"PLEASE NOTE we always recommend that you buy your Frog bike from your local Frog store, who will build it for you and ensure the fit is right for your child. Our bikes should always be built and checked by a qualified mechanic".

  Minimum Inside Leg In CM (in") Approx Age Wheel Size Frame Size
Tadpole Mini 24cm 1-2 10"  
Tadpole  31cm (12") 2-3 12"  
Tadpole Plus 38cm (15") 3-4 14"  
Frog 43 43cm (17") 3-4 14" 9"
Frog 48 48cm (19") 4-5 16" 9.5"
Frog 52s 52cm 5-6 20" 10"
Frog 52 52cm (20") 5-6 20" 10"
Frog 55 55cm (22") 6-7 20" 11"
Frog 62 62cm (24") 8-10 24" 12"
Frog 69 69cm (27") 10-12 26" 14"
Frog 73 73cm (29") 12-14 26" 16"
Frog 78 78cm (31") 13+ 26" 18"
Frog Road 58 58cm (23") 6-7 20" 11"
Frog Road 67 67cm (26") 8-12 24" 14"
Frog Road 70 70cm (27") 11-14 26" 17"
Frog MTB 62 62cm (24") 8-10 24" 12.5"
Frog MTB 69 69cm (27")      
Frog MTB 72 72cm (28") 12-14 26" 16"

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).