Frog 55 Kids Bike
Frog 55 Kids BikeFrog 55 Kids BikeFrog 55 Kids BikeFrog 55 Kids BikeFrog 55 Kids BikeFrog 55 Kids BikeFrog 55 Kids BikeFrog 55 Kids Bike
Code: FROG-55
The Frog 55, the ultimate lightweight bike for kids, the high quality frame and forks, make this a sturdy bike just right for kid sized biking adventures. Suitable for age range 6-7 years.
The Frog 55 has adjustable Tektro brakes, 8-speed Shimano easy-change thumb shifters and 8 speed cassette hub.  Suitable for minimum inside leg of 55cm (around 6-7 years old), it has 20" wheels. The all-aluminium bike has a high quality frame, easily adjusted saddle height and a crank length of 114mm.  Comes with 2 sets of Kenda tyres: a hybrid tyre and a more knobbly off-road tyre. (The knobbly tyres are not compatible with mudguards)
Comes with a bell, reflectors and mudguards as standard.  Free 5 year warranty available on the frame and forks, 2 years on all other parts.
Available in Red, Purple, Orange, Spotty, Union Jack, Team Sky black or Team Sky white.


  • Approx Age 6-7
  • Colour FROG: Red, Purple, Orange, White/Spots TEAM SKY: White/Blue, Black/Blue
  • Weight 8.8 kg or 19.4 lbs
  • Fork Aluminium Fork
  • Frame Aluminium 11" Frog 55 Frame
  • Wheel Size 20"
  • Headset 27mm
  • Bottom Bracket 110.5mm Sealed Bottom Bracket
  • Crank 114mm Aluminium Black Crank
  • Chain Ring Steel 32 Teeth
  • Chain Guard Integral Black Double Chain Guard
  • Brakes Tektro 836AL Aluminium V Brake Black
  • Brake Levers Tektro Aluminium JL510-TS V Brake Lever Black
  • Length of top tube 449mm (horizontal distance from seat post to stem: 474mm)
  • Stem Frog Bikes Aluminium 38mm Stem
  • Handle Bar Frog Bikes Aluminium Straight Handlebar Width 460mm
  • Grip Frog Bikes Locking Slim Grips
  • Saddle Frog Bikes Saddle Size:201*136mm, Black, adjustable rails for better fit
  • Seat Post Aluminium 250mm, 27.2mm wide, Quick Release
  • Pedal Plastic with Ball Bearings and Reflectors
  • Bell Bell
  • Rim Aluminium 20" x 1.5" 28 holes Black (Weight:320g) and Quick Release for easy removal of wheels
  • Hubs Aluminium 28 holes
  • Tyres Kenda 20" x 1.5" hybrid tyres
  • Tubes Kenda 20" x 1.5" with Schrader Valves
  • Right Hand Gear Shifter SLM360 Alivio 8 speed Right Hand Gear Lever
  • Rear Derailleur RD-FT55- Direct 8SP
  • Cassette Hub Shimano 8 Speed 12-32T
  • Reflectors White & Red front & rear reflectors, 2x wheel reflectors (in both white and orange)
  • Mudguard Plastic Mudguards front and rear
  • Frame Protectors Clear stickers for chainstay and frame
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$ 37.50
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How to choose a Child's Bike

In contrast to many children's bikes, Frog bikes are sized by the 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 age.

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

  1. Stand the child in socks against 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 bike for your child. Note we give the MINIMUM inside leg length for each bike, with the saddle at it's lowest setting. At this height, the child will safely be able to get their feet to the ground. Don't worry - Frog Bikes have long seat posts, so the saddle can be raised a long way as the rider grows.

 BikeMinimum inside
leg (cm)
Approx ageWheel SizeFrame Size
Frog 43433-414″9″
Frog 48484-516″9.5″
Frog 52525-620″10″
Frog 55556-720″11″
Frog 62628-1024″12″
Frog 696910-1226″14″
Frog 737312-1426″16″
Frog Road 58586-720″11″
Frog Road 67678-1224″14″
Frog Road 707011-1426″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 back and forwards on their rails.(These adjustments are easy to do and just need an allen key; instructions are in the manual that comes with each bike.

I bought this for my 5.5 year old son. Excellent bike even if it is bit big now. The difference to "market" bikes is huge. Very fast delivery to Finland (3-4 working days). Bike was well packed.
A great little bike for our 6 year old. The bike is well made with quality parts.