Specialized Riprock Coaster 20"
The Specialized Riprock Coaster 20" is a simple and confidence-inspiring children’s bike designed for neighbourhood riding, family adventures and exploring easy paths. Its lightweight aluminium frame, single-speed drivetrain, coaster brake and wide 2.3-inch tyres make it easy to ride while providing plenty of stability on sealed and unsealed surfaces.
Easy-to-Handle Aluminium Frame
The A1 Premium aluminium frame keeps the bike manageable while providing the durability needed for everyday use. Its low standover height makes it easier for young riders to get on and off the bike, place their feet on the ground and remain comfortable as they grow.
The rigid steel fork keeps steering predictable and removes the additional weight and maintenance associated with suspension.
Simple Single-Speed Drivetrain
With only one gear, the Riprock Coaster 20" allows children to concentrate on steering, braking and enjoying the ride. There are no gear levers or derailleurs to understand, making it a practical choice for riders moving onto their first larger bike.
The enclosed simplicity of the single-speed drivetrain also reduces maintenance and keeps everyday operation straightforward.
Familiar Coaster Braking
The rear coaster brake is operated by pedalling backwards, providing a braking action many young riders find intuitive. It allows children to slow down without relying entirely on hand strength or remembering which brake lever to use.
Hand-operated V-brakes introduce young riders to conventional brake levers and provide additional speed control as their confidence develops. The rear lever includes tool-free reach adjustment to suit smaller hands.
Wide Tyres for Stability
Specialized Rhythm Lite 20 x 2.3-inch tyres provide a broad and stable contact patch. Their additional volume improves comfort and traction across footpaths, gravel tracks, grass and other uneven surfaces.
The wide tyres also help the bike feel less nervous, giving children more confidence when turning or riding over small bumps.
Comfortable Child-Friendly Setup
A raised BMX-style handlebar provides an upright riding position with good visibility and easy steering. The Specialized Kids’ Henge saddle and correctly proportioned cockpit help create a comfortable position for recreational riding.
Platform pedals with reflectors provide a stable surface for everyday footwear and improve visibility in lower-light conditions.
Key Features
- Frame: Lightweight Specialized A1 Premium aluminium
- Fork: Rigid Hi-Ten steel
- Wheels: 20-inch alloy
- Tyres: Specialized Rhythm Lite 20 x 2.3-inch
- Drivetrain: Simple single-speed
- Chainring: 36T steel
- Rear cog: 18T
- Rear brake: Coaster brake operated by back-pedalling
- Hand brakes: Linear-pull V-brakes
- Brake lever: Tool-free reach adjustment
- Crankset: 114mm Hi-Ten steel
- Handlebars: 560mm BMX-style steel
- Saddle: Specialized Kids’ Henge
- Pedals: Nylon platforms with reflectors
- Frame size: One size
- Claimed weight: 10.6kg
Why Young Riders Love the Specialized Riprock Coaster 20"
The Specialized Riprock Coaster 20" provides a simple and stable platform for children developing their confidence. Its wide tyres, uncomplicated drivetrain and familiar braking system allow young riders to focus on balance, steering and having fun.
Simple to Ride
The single-speed drivetrain removes gear selection from the equation, making the bike easy to understand from the first ride.
Stable Handling
Wide 2.3-inch tyres provide useful grip and stability, helping the bike feel predictable on sealed paths and light off-road surfaces.
Easy Braking
The coaster brake allows children to slow down by pedalling backwards, while the hand brakes help them begin learning conventional braking skills.
Low Standover Height
The frame’s low top tube makes it easier for children to stand over the bike and put their feet down when stopping.
Comfortable Riding Position
The raised handlebar creates an upright position that helps young riders look ahead and steer confidently.
Low Maintenance
With no derailleur, shifter or suspension fork to maintain, the Riprock Coaster 20" is straightforward for families to look after.
Built for Everyday Adventures
Its durable frame, alloy wheels and high-volume tyres suit neighbourhood riding, family outings, gravel paths and trips to the park.
Who Is This Bike For?
Perfect For
✔ Children progressing to a 20-inch bike
✔ Young riders who do not yet need gears
✔ Neighbourhood and family rides
✔ Sealed cycleways and gravel paths
✔ Grass and easy off-road surfaces
✔ Children familiar with coaster braking
✔ Families wanting a simple, dependable children’s bike
Our Thoughts on the Specialized Riprock Coaster 20"
The Riprock Coaster 20" keeps things nice and simple. There are no gears to think about, the frame is easy to step over and the wide tyres help the bike feel steady on footpaths, gravel and grass.
The back-pedal brake is easy for younger riders to understand, while the front hand brake gives them a chance to practise using a brake lever. We also like that the lever can be adjusted closer to the handlebar, which makes a real difference for smaller hands.
It’s a good, solid bike for riding with the family, heading to the park or exploring around the neighbourhood. If your child isn’t ready for gears but wants something that feels more like a mountain bike, the Riprock Coaster 20" makes a lot of sense.
Why Buy from Chain Reaction?
✔ Official Specialized Dealer
✔ Professionally assembled and safety checked before collection or dispatch
✔ Brakes adjusted and tested by our workshop
✔ Handlebar, saddle and control positions checked
✔ Expert children’s bike sizing and setup advice
✔ Complete bike handover with a feature and safety walkthrough
✔ Lifetime workshop support from experienced mechanics
✔ Nationwide New Zealand delivery
✔ Finance options available
Size Guide
The Riprock Coaster 20" uses a one-size frame and 20-inch wheels. Rider height is only a starting point when sizing a children’s bike, as inside-leg measurement, confidence and previous riding experience are equally important.
The rider should be able to stand over the frame comfortably, reach the handlebars without stretching and operate the brake levers securely. Contact Chain Reaction for personalised sizing advice or bring your child into the store for a fitting.
Delivery and Assembly
Every Specialized Riprock Coaster 20" purchased from Chain Reaction is professionally assembled and safety checked by our workshop.
Your bike receives:
- Complete professional assembly
- Full workshop safety inspection
- Coaster brake operation checked
- Front and rear V-brakes adjusted
- Brake-lever reach checked and adjusted
- Chain tension checked
- Handlebar and saddle positions initially set
- Tyre pressures checked and set
- Secure packaging for transport
- Nationwide New Zealand delivery
- Click & Collect where available
For nationwide delivery, the bike is securely packaged after its workshop inspection. Some minor final assembly is required after unpacking. Instructions are included, and the Chain Reaction team is available if assistance is needed.
Specifications are based on manufacturer information and may change without notice.