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Frog 40 Kids Bike

19 reviews


Electric Blue

Product Details

Brand new design to fit smaller kids!   Super lightweight.  Fun colors.  

Fits:  3-4 yrs (minimum inseam 15")

Availability:  Pre-order now for shipment on November 25th!

Recently the Frog 43 was redesigned into the Frog 40 to allow a smaller child to fit the bike.  The Frog 40 now fits a child with a 40 cm (15 in) inseam.

Frog Bikes believes that the lighter the bike, the easier it is for children to learn to ride, so they'll enjoy it more!   Many kids' bikes on the market weigh nearly as much as the child. Frog set about re-designing kids' bikes, creating a light but strong aluminum frame, and hand-picking quality components that offer a high performance without compromising the weight.

The 14" Frog 40 is the ideal first pedal bike.  Extremely light at only 13.9 lbs, the Frog 40 inspires confidence by making it easier to maneuver for small children.  Perfect for chasing bigger kids in the park!   Suitable for riders aged 3-4 years old with a minimum inside leg height of 40cm (15"). From start to finish, this bike was designed with kids in mind.

The Frog 40 Bicycle features:

  • Patented Frog Cranks:  Reduced distance between pedals increases efficiency and comfort
  • Easy Reach Tektro Hand Brakes with adjustable levers to make braking easier for smaller hands.  Better control means improved confidence for young riders.
  • Kenda knobby off-road tires (that also work well on the road or bike path)
  • Safety Steering Lock: Prevents oversteering which can cause an accident.  Safer for learners, but still super nimble for more aggressive riders!
  • Mudguards you can easily install if you ride regularly where the mud is flying. 
  • Soft handlebar grips 
  • 14" wheels
  • A bell to let others know you're approaching
  • 6 reflectors (1 for the front, 1 for the back and 4 for the wheels).
  • The Frog 40 comes with the freewheel installed. The coaster brake kit is available upon request.

Frog Bikes partners with USA cyclingFrog Bikes has partnered with USA Cycling to be their Official Kids' Bike through 2020.

See the Frog 40 in action!

Tech Specs

Approx Age 3-4 years
Red, Orange, Green, spotty, Pink and Team Sky, Union Jack
Weight 6.3 kg or 13.9 lbs
Minimum Seat Height 15"
Fork Aluminum Fork
Frame Aluminum 9" Frog 43 Frame
Wheel Size 14"
Head Set Locking headset, 27mm
Bottom Bracket 116mm Sealed Bottom Bracket
Crank Set Alloy 102mm Black
Chain Ring Steel 32 Teeth
Chain Guard Integral Black Chain Guard. Full chain guard supplied on new spec only.
Brakes Tektro C310 Aluminum V Brake Black
Brake Levers Tektro Aluminum JL352-RS V Brake Lever Black
Length of top tube 330mm (horizontal distance from seat post to stem: 343mm)
Stem Frog Bikes Aluminum 35mm Stem
Handlebar Frog Bikes Aluminum Little Handlebars Width 420mm 
Grip Frog Bikes Specific Slim Grips
Saddle Frog Bikes Saddle Size:201*136mm, Black, adjustable rails for better fit
Seat Post 180mm long aluminum 27.2 
Pedal Plastic with Ball Bearings and Reflectors
Bell Bell
Rim Aluminum 14" x 1.5" 20 holes Black (Weight:200g)
Hubs Aluminum 20 holes
Kenda K1153 14"x1.75 knobby tires
Tubes Kenda 14" x 1.5" with Schrader Valves
Right Hand Gear Shifter Single Speed
Rear Derailleur n/a
Free Wheel 16 T Copper
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 


On top of quality products, Frog is a an environmentally friendly company, working hard to preserve our beautiful planet for the children who are riding their bikes.  The Frog factory has achieved ISO4001 environmental credentials in recognition of their effective environmental management system.


All Frog 40 bikes arrive 90% assembled. All you need to do is install the pedals, seatpost, handlebars and front wheel.  If you decide you want the optional mud guards and full chain guard on your bike, these will need to be installed also.  

Our professional bike technician looks over every bike before it ships and switches the hand brakes to be standard for the US (rear on the right, front on the left).  

    Frog 40 Assembly Manual

    If you have any questions about assembling your bike, please don't hesitate to contact us via email or call (970) 718-BIKE.  

    We are now offering shipment of this bicycle fully assembled with our Ride Out of the Box Premier Shipping Service.  


    Free 5 year warranty available on the frame and forks, 2 years on all other parts.



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    Customer Reviews
    4.9 Based on 19 Reviews
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    Filter Reviews:
    Ryan S.
    United States United States

    Bike is good quality. Lack of instructions on assembly is a bit frustrating and the brakes were not properly calibrated so need to take to bike shop to fix as my knowledge on this subject is limited. When all said and done I am sure this will be a great bike

    United States United States
    Excellent little kids' bike

    After struggling with several other cheap/tippy/heavy kids' bikes for two years, my daughter was zooming around without pedals right away on this new bike and then learned how to bike with pedals within a few weeks. I highly recommend!

    Tristin S.
    United States United States
    Great Choice for a First Bike

    The Frog has been an awesome first pedal bike. My son is 4 and rode a balance bike prior to purchasing this bike. It's light enough for him to handle, he loves the color, and is a superior quality to a lot of other bikes we have seen. We have been very happy with the bike & my son loves to ride it!

    United States United States
    Frog 40 for the win!

    My son LOVES his new bike! Best transition from a balance bike ever! Ready Set Pedal was crucial in helping us understand the importance of the transition and steered us in the right direction.

    Ready, Set, Pedal! Frog 40 Kids Bike Review
    United States United States
    Get this bike

    Great quality. And it looks great! The brakes work smoothly for our little guy. He used a balance bike from 1.5yrs to 3yrs. Jumped on this bike and was riding within 15 minutes. We bought this particular one because our little boy is small for his age so the min seat height and low weight of the bike were selling points for us and proved to be totally worth the money.