The Frog 47 is the perfect next step for children who are ready to upgrade from smaller bikes. This premium 18-inch kids' bike is built for 4- to 6-year-olds, combining a light aluminium frame with high-quality, child-specific components to make riding smoother, easier, and more fun.
Frog 47
Why buy Frog 47
First Pedal Bikes
Frog 47 | Best 18-inch bike for young riders
Ready to upgrade your child to an 18-inch pedal bike?
The Frog 47 is the perfect next step for children who are ready to upgrade from smaller bikes. This premium 18-inch kids' bike is built for 4- to 6-year-olds, combining a light aluminium frame with high-quality, child-specific components to make riding smoother, easier, and more fun. With an adjustable handlebar height and quick-release seat post, the Frog 47 adapts as your child grows, meaning you won't need to size up too soon. From cycling to school and exploring park paths to weekend family adventures, this lightweight bike helps young riders develop balance, coordination, and lifelong cycling confidence. The Frog 47 is suitable for children with an inside leg measurement of 43-59cm.
Built to grow alongside your child
The Frog 47 kids' first pedal bike is fully adjustable to keep pace with your child's growth spurts. The tool-free quick-release seat post and adjustable handlebars mean you can fine-tune the fit in seconds, ensuring comfort, control, and proper riding posture as children get taller.

Effortless pedalling with patented cranks
Specially designed patented cranks (made using 75% recycled aluminium) reduce the distance between the pedals on this 18-inch first pedal bike, making riding more efficient and less tiring for little legs. This unique design helps children pedal smoothly, improve coordination, and enjoy longer rides without fatigue.

Lightweight for easy handling
Weighing just 6.75kg, the Frog 47 is one of the lightest 18-inch kids' bikes on the market. Children can lift, push, and manoeuvre it with ease, while parents will love how simple it is to carry or load into the car. The robust aluminium frame (made using 30% recycled aluminium) is built for years of adventures without weighing riders down.

Safety-first design
The Frog 47 18-inch kids' bike comes with child-friendly brake levers sized for small hands, a responsive braking system, and a stable frame geometry that keeps riders balanced. Chunky handlebar grips give extra control, while the enclosed chainguard protects clothing and fingers.

Convert to a balance bike
Not quite ready for pedals? Remove them to turn the Frog 47 18-inch first pedal bike into a balance bike, helping your child build core cycling skills at their own pace before transitioning back to full pedalling.
Built for safety, trusted by parents
Every Frog bike is rigorously tested to exceed international safety standards - because nothing matters more than your child's safety.
Ready to ride - What's included?
The Frog 47 kids' first pedal bike comes equipped with essential safety features and practical kids' bike accessories, including reflectors for improved visibility, durable mudguards (valued at £28) to keep clothes clean, and a bell for added fun on every ride. While a kickstand isn't included, it's available separately, giving you the flexibility to add extra convenience to your child's first pedal bike experience.
Bike assembly – Quick & easy setup
Your Frog bike arrives 95% pre-assembled to ensure safe delivery and a hassle-free setup experience. Only a few simple steps are needed to get your child’s new bike ready to ride:
Assembly steps:
- Align and secure the handlebars (pre-positioned for transit)
- Attach the pedals (packaged separately for safety)
Tools included:
- 5mm and 6mm hex keys (allen wrenches)
- 15mm open-end spanner
Protect their bike with warranty cover
Ride worry‑free with comprehensive coverage and optional extended protection.
2 Year Standard Warranty
Free warranty on all bikesAt Frog Bikes, we stand by the quality of our products with a standard 2-year warranty covering all frames, forks, parts, and paintwork (excluding tyres and inner tubes). Suspension forks are also covered by a 2-year warranty but are not included in our extended warranty offer.
Warranty Plus
Free upgrade to 10‑year coverLooking for extra peace of mind? We offer a FREE 10-year extended consumer warranty on frames and forks (excluding MTB suspension forks) when you complete and submit our Warranty Plus application within 28 days of purchase.
This frog bikes extended warranty is available for new, full-priced bikes and bikes purchased directly from our Frog Factory Outlet. For full details, please visit the Frog Bikes Warranty Plus application page below.
- FREE 10-year frame & fork cover
- Simple online activation
- Extended peace of mind
- Backed by Frog expertise
Note: The Warranty Plus offer is non-transferable.
Assembled, checked & delivered with care
Your Frog bike is built, inspected, and delivered to your door with free standard delivery to mainland UK addresses.
Free delivery
Free standard delivery is available for UK consumer orders shipping to mainland UK addresses.*
Arrives pre‑assembled
All Frog kids' bikes are carefully assembled, quality-checked, and typically dispatched within 5 business days of order confirmation.
Packaged with care
Our packaging is 82% recycled, 100% recyclable, and virtually plastic-free.
*For deliveries to non-mainland UK addresses, such as Northern Ireland, the Isle of Man, the Channel Islands, or the Scottish Highlands and Islands, additional local taxes, customs fees, or carrier surcharges may apply. These charges are the responsibility of the customer.
We're here to help
We want you to have the best experience with your new Frog Bike, so our customer service team are only a click or call away!
Need help? We're here for you
Our friendly and knowledgeable customer support team is ready to assist you with anything you need, from order updates and product questions to assembly guidance and warranty information. We're here to make your experience smooth and stress-free.
Get in touch via email or phone, and we’ll be happy to help!
Got questions?
Before reaching out, check out our Frequently Asked Questions (FAQ) page; it’s the quickest way to find clear, helpful answers to common queries. From choosing the right bike size and understanding delivery times to assembly tips and warranty info, we’ve covered all the essentials.
If you can't find what you're looking for, our support team is always just a click away.
| Product Safety Certifications | ISO 4210-2C and CPSC 1512 (CFR 1512) |
|---|---|
| Bike Weight | 6.75kg (incl pedals) |
| Frame | 6061 T6 heat treated Aluminium alloy, seat tube 255mm |
| Fork | 6061 T6 heat treated aluminium alloy |
| Front Hub | Quando, aluminium, sealed hub, 5mm allen bolt internal fixing, 16 hole |
| Rear Hub | Quando, aluminium, sealed hub, standard freewheel thread and 5mm allen bolt internal fixing, 16 hole, drive side chain tensioner |
| Cassette free wheel | ATA, standard ISO thread, 18t, 4 prong removal, chrome plated/brown |
| Rim | Aluminium, 18", double wall, machined braking surface |
| Seat Clamp | Aluminium, Quick Release |
| Headset | Neco, 1"1/8 , threadless, safety steering stop, Frog Bikes top cap |
| Stem | Aluminium, 1"1/8, 38mm, 4 bolt clamp |
| Grips/Bar Tape | Frog Bikes specific, lock on, slim grips |
| Brakes (F&R) | Tektro 836AL, Aluminium, linear pull |
| Tyres | Kenda K1047, 16"x1.5", Hybrid, (ETRTO/ISO: 38-305) |
| Mudguards | Resin, black |
| Accessories Included | Bell, bike reflectors white/red, wheel reflectors orange/white, paint plasters, frame protector patches |
| Crankset/Chainring | Frog Bikes Patented, 102mm, Aluminium straight arm cranks, 32T chainring, Black |
| Bottom Bracket | Thun, square taper, 68/107.5, cartridge bearings |
| Pedals | Resin platform, 9/16" thread, w/reflectors |
| Chain | KMC, single speed |
| Handlebar | Aluminium, 30mm riser bar, 440mm |
| Brake Levers | Tektro JL510, Aluminium, easy reach |
| Saddle | Frog Bikes child-specific saddle (small), steel rails |
| Freewheel/Fixed Wheel | ATA, standard ISO thread, 18t, 4 prong removal, chrome plated |
| Seat Post | Aluminium, micro adjust, 255mm |
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| A - Wheelbase (mm) | 770 | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B - Seat Tube Angle (°) | 74 | |||||||||||||||||||||||
| C - Head Tube Angle (°) | 74 | |||||||||||||||||||||||
| D - Effective Top Tube (mm) | 415 | |||||||||||||||||||||||
| E - Head Tube Length (mm) | 100 | |||||||||||||||||||||||
| F - Chain Stay Length (mm) | 315 | |||||||||||||||||||||||
| G - Seat Tube Length (mm) | 255 | |||||||||||||||||||||||
| H - Bottom Bracket to Floor (mm) | 190 |