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Radius · Juvenile
A simple, confidence-building 20-inch bike for kids who are ready to ride further and shift for themselves.
$549.99
PriceIn stock, ready to ship
The Radius Trailraiser 3 is a smart step-up for young riders who have outgrown a single-speed but don’t need the complexity of a full derailleur setup. Its 3-speed internal hub, low stand over frame and kid-friendly braking layout make it an easy bike to live with for school rides, park laps and family path adventures.
Sold by Ashburton Cycles
Verified store
Price
$549.99
Wheel size
20″
Frame
6061 alloy Boy's 20" frame
Gears
Shimano Nexus 3 speed with coaster hub
If you’re looking for a kids’ bike that keeps things simple without feeling basic, the Radius Trailraiser 3 hits a really practical sweet spot. You get a 20-inch alloy frame, low stand over height and junior-specific geometry that help young riders get on and off easily, feel balanced at low speed and build confidence as they start riding further from home.
What really sets this bike apart is the Shimano Nexus 3-speed internal hub. For many families, that means less fuss than an exposed derailleur setup and an easier way for kids to learn when to change gear on bike paths, around the neighbourhood or on smooth gravel. Paired with the coaster rear brake and short-reach front brake lever, braking stays intuitive for riders who are still developing hand strength and coordination.
This is the sort of bike we’d recommend for everyday Australian riding where the goal is reliability, easy ownership and a comfortable fit rather than trail-bike aggression. The 560mm riser bar, adjustable quill stem, slick 20 x 1.75 tyres and centre kickstand all add up to a bike that’s straightforward, tidy and well suited to regular family use.
Ideal for a young rider around primary-school age who wants an easy, low-maintenance geared bike for neighbourhood rides, school runs and shared paths.
Shimano Nexus 3-speed hub
Internal gearing keeps shifting simple and tidy, with fewer exposed parts to knock out of adjustment.
Low stand over 6061 alloy frame
Makes it easier for kids to hop on, stop safely and feel more confident as they learn.
Junior-specific geometry
Balanced handling helps younger riders steer predictably and stay comfortable on everyday rides.
Front hand brake plus coaster rear brake
A familiar, confidence-building setup that lets kids use both foot and hand braking as their skills grow.
Short-reach brake lever
Better suited to smaller hands, so front braking feels easier to control.
560mm riser bar and adjustable quill stem
Gives an upright riding position and useful fit adjustment as your child grows.
20 x 1.75 slick tyres
Roll smoothly on pavement and hard-packed paths, making the bike feel easier to pedal.
Kickstand and double chainguard
Practical everyday extras that help with parking and keep clothing away from the chain area.
Every component as listed by the manufacturer.
Radius is an Australian-designed bicycle brand within the Apollo Bicycles stable, focused on accessible bikes for kids, families and recreational riders. The range centres on practical designs, approachable fit and everyday value rather than specialist racing or high-performance categories. The brand is known for building entry-level and family-friendly bikes with comfort-focused layouts, easy handling and a broad spread of wheel sizes. Radius also highlights Australian design, value for money and a limited lifetime warranty as core parts of the brand offering.
Radius · Juvenile
A simple, confidence-building 20-inch bike for kids who are ready to ride further and shift for themselves.
$549.99
In stockWheel size
20″
Frame
6061 alloy Boy's 20" frame
Gears
Shimano Nexus 3 speed with coaster hub
Brakes
Alloy linear pull front brake + coaster rear brake
The Radius Trailraiser 3 is a smart step-up for young riders who have outgrown a single-speed but don’t need the complexity of a full derailleur setup. Its 3-speed internal hub, low stand over frame and kid-friendly braking layout make it an easy bike to live with for school rides, park laps and family path adventures.
If you’re looking for a kids’ bike that keeps things simple without feeling basic, the Radius Trailraiser 3 hits a really practical sweet spot. You get a 20-inch alloy frame, low stand over height and junior-specific geometry that help young riders get on and off easily, feel balanced at low speed and build confidence as they start riding further from home.
What really sets this bike apart is the Shimano Nexus 3-speed internal hub. For many families, that means less fuss than an exposed derailleur setup and an easier way for kids to learn when to change gear on bike paths, around the neighbourhood or on smooth gravel. Paired with the coaster rear brake and short-reach front brake lever, braking stays intuitive for riders who are still developing hand strength and coordination.
This is the sort of bike we’d recommend for everyday Australian riding where the goal is reliability, easy ownership and a comfortable fit rather than trail-bike aggression. The 560mm riser bar, adjustable quill stem, slick 20 x 1.75 tyres and centre kickstand all add up to a bike that’s straightforward, tidy and well suited to regular family use.
Ideal for a young rider around primary-school age who wants an easy, low-maintenance geared bike for neighbourhood rides, school runs and shared paths.
Shimano Nexus 3-speed hub
Internal gearing keeps shifting simple and tidy, with fewer exposed parts to knock out of adjustment.
Low stand over 6061 alloy frame
Makes it easier for kids to hop on, stop safely and feel more confident as they learn.
Junior-specific geometry
Balanced handling helps younger riders steer predictably and stay comfortable on everyday rides.
Front hand brake plus coaster rear brake
A familiar, confidence-building setup that lets kids use both foot and hand braking as their skills grow.
Short-reach brake lever
Better suited to smaller hands, so front braking feels easier to control.
560mm riser bar and adjustable quill stem
Gives an upright riding position and useful fit adjustment as your child grows.
20 x 1.75 slick tyres
Roll smoothly on pavement and hard-packed paths, making the bike feel easier to pedal.
Kickstand and double chainguard
Practical everyday extras that help with parking and keep clothing away from the chain area.