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Frog 40 Kids Bike

24 reviews


Electric Blue

In Stock

Product Details

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

Fits:  3-4 yrs (minimum inseam 15")

Availability:  Available in Electric Blue, Spotty and Red.  All other colors are temporarily out of stock.

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, Team Sky and Union Jack
Weight 6.3 kg or 13.9 lbs
Minimum Seat Height 16.5"
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 24 Reviews
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    Filter Reviews:
    United States United States
    Mostly a great bike

    My 3 year old grandson loves it and it is clearly very well made. I did not give it a 5 because NO instructions came with the bike, and because it is advertised as having a chain guard but it is impossible to put the chain guard on by yourself unless you are a bike expert.

    United States United States
    Super easy pedal

    The bike is very light with pedals very technically constructed to make the transition extremely easy for little ones. My daughter is a little under 4 year old and was already pedaling without training wheels on this on her very first day. She did have good balance bike experience but still it was a breeze. And she loved the spotty color.

    KATE M.
    United States United States
    Great bike, love Ready, Set, Pedal

    Ready Set Pedal was responsive and helpful when we needed help with putting the bike together -- even over the busy holiday season. The bike is amazing. We are currently using it as a step up from a balance bike without pedals for our 3 year old to get used to the hand breaks and increased speed. It's lighter and faster than the balance bike he started on. He LOVES his new red mountain bike.

    Kay L.
    United States United States
    Excellent Bike & Customer Service

    Our 4 yr old grandson is thrilled with his new Frog 40 and the neon green color. Fits him beautifully and the son-in-law is very happy with the quality! We are quite impressed with Ready, Set, Pedal's service. They communicated thru emails AND phone calls, explaining any delays (shipping during the pandemic AND East Coast storm) and our options. They think outside the box and will do everything they can to help their customer. A+ for this store!

    Courtney B.
    United States United States
    Bike is perfect!

    Perfect bike for my daughter who learned on a balance bike! I searched for weeks for the perfect bike and this is definitely it!! She hopped right on and started riding!