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Frog 55 Kids Bike - 20 Inch


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Product Details

Frog 55 - 20 Inch (Wheels) Kids Bike

The Frog 55 is an easier rolling, lighter weight 20 inch wheel kids' bike. Frog 55 is recommended for children with a minimum inside leg measurement of 55cm (22 inches). Frog is an award-winning British company specializing in better quality kids' bikes. 

Special Offers

Reserve this bike (and get free storage until Christmas) for £10. Learn more >

Part-exchange your current Frog to save money on a new one. Learn more >

Key Features

  • Lightweight aluminium alloy frame (11 inch seat tube) and fork.
  • Quick release (no need to carry a spanner to change a tube) aluminium wheels.
  • Easy to use, high quality Shimano Alivio Rapidfire Plus 8-speed gear shifter
  • The alloy cranks are a child-friendly short (114mm) length with 36t chainring.
  • The sealed bottom bracket ensures these cranks spin freely.
  • The 460mm alloy handlebar is fitted with narrow grips for smaller hands.
  • This bars are fitted to a short 40mm alloy stem to keep them within easy reach.
  • Tektro alloy V-brakes with alloy levers are such excellent stoppers, they are a common sight on good quality £300-£400 adult bikes.
  • Being a British company, Frog know to equip their bikes with front and rear mudguards.
  • Minimum recommended inside leg measurement to the floor: 55cm.
  • Minimum recommended child height: 122cm.
  • Approximate age range: from 6/7 to 9/10 year old.
  • Manufacturer's published weight: 8.9kg.

Lighter Weight
Frog bikes, like better-quality adult bikes, are built with aluminium frames and (mostly) aluminium parts to keep the weight to a minimum. That way your child(ren) will experience maximum joy riding one of these bikes.

Faster wheels
Another original detail is that the Frog 55 comes with lightweight alloy quick release wheels fitted with good quality Kenda 20 x 1.5 inch hybrid tyres which will be easier rolling than the 20 x 2 inch knobbly mountain bike tyres you'll find on most of their competitors' bikes. Skinnier tyres make a Frog bike easier to accelerate and hence more fun to ride much of the time.

Colour choice
Technical attributes aside, this is no ugly frog. Frog bikes look good, so your child should be really proud to own one. To help ensure the bike delights, Frog bicycles are available in a choice of colours.

More size choice for just the right fit
An example of their original approach, rather than numbering their kids' bikes by wheel size, Frog size their bikes by inside leg measurement. Hence the Frog 55 is recommended for children with a minimum inside leg measurement of 55cm (22 inches). This corresponds with other manufacturers' 20 inch wheel kids' bikes, so the Frog 55 would make a great present for children from 6/7 year olds. It comes with a long aluminium seatpost with a quick release seat binder to make it easy to adjust the saddle as the child grows all the way up to 8, 9 or 10 years old.

Note that Frog also offer the slightly smaller (52cm stepover height) Frog 52 bike with 20 x.1.5-inch hybrid tyres for slightly shorter kids. Put it another way, if the Frog 55 is slightly to large for your young 'un, the Frog 52 should be perfect. If you want the bike to fit for as long as possible before it's outgrown, go for the Frog 55. Offering different sizing options - even when the bikes have the same wheel size - is a perfect illustration of the extra care taken by Frog to ensure their bikes fit better than their rivals' who offer their 20-inch wheel bikes in just one frame size. Frog Video
Frog's passion for making better bikes for kids shines through in this video.

Shop All Frog Bikes >

Shop All Kids Bikes >

Frog Bikes Size Guide >

Technical Specifications

FrameAluminium 11" Frog 55 Frame
ForkAluminium Fork
Wheel Size20"
Head Set27mm
Bottom Bracket116mm Sealed Bottom Bracket
Crank Set140mm Aluminium Black Crank
Chain RingSteel 36 Teeth
Chain GuardIntegral Black Chain Guard
BrakesTektro 836AL Aluminum V Brake Black
Brake LeversTektro Aluminium JL510-TS V Brake Lever Black
StemFrog Bikes Aluminium 80mm Stem
HandlebarFrog Bikes Aluminum  Straight Handlebar Width 520mm
GripFrog Bikes Specific Slim Grips
SaddleFrog Bikes Saddle Size:201*136mm, Black, adjustable rails for better fit
Seat PostAluminum 27.2
PedalPlastic with Ball Bearings and Reflectors
RimAluminium 20" x 1.5" 28 holes Black (Weight:320g) and Quick Release for easy removal of wheels
HubsAluminium 28 holes
TyresKenda 20" x 1.5" hybrid tyres.
TubesKenda 20" x 1.5" with Schrader Valves
Right Hand Gear ShifterShimano Alivio Rapidfire shifter 8 Speed Black
Rear DerailleurShimano RD-TY21 Black
Free WheelShimano 8 Speed Index 11-32T
Front ReflectorWhite
Rear ReflectorRed
MudguardPlastic Mudguards front and rear
Weight9.18kg / 20.2lbs

This weight is based upon a 20” wheel sized example of this bike. We weighed the complete bike as you would receive it.


Our suppliers reserve the right to change specifications and prices without notice. Edinburgh Bicycle Cooperative will do all it can to maintain prices and specifications on this web site, however we do reserve the right to change specifications and prices without notice. Similarly, despite the wonders of modern computers, it is realistic to expect the colour of any item bought to differ subtly from the image online.