Black, Black Mist, Black Scarlet, Plum, Teal
All-in-one car seat
Based on our bestselling US convertible car seat, Radian 5 provides ultimate protection with extended rear facing capacity and longer 5 point harness use when forward facing. Suitable from birth to 25kg rear facing and 9-25kg forward facing, Radian 5 gives you the option to choose what’s right for you and your family at a time to suit you.
With a higher weight capacity, Radian 5 is the only seat which is suitable from birth, offers extended rear facing and converts to a forward facing car seat with a 5 point harness to 25kg. The unique steel frame means Radian 5 is super strong to resist crash forces and offer the most amount of protection. Metal reinforcements and the best EPP foam combine to provide the ultimate side impact protection, whilst the straight side walls ensure your child stays contained in the seat during a crash. The narrow design takes up less space in the back because it’s not necessary to have thick plastic sidewalls. For some larger cars this means 3 car seats can be installed in the vehicle.
Extended Rear Facing
With a rear-facing capacity up to 25kg, Radian 5 allows babies to travel in the safest position for as long as possible. Extended rear facing can be up to 5 times safer as it protects and supports the neck in the event of a collision. A rear facing car seat can also be more comfortable giving little ones somewhere to rest their legs. As your child grows and reaches each milestone, you can decide the right time to turn forward-facing. When you do transition from rear facing, Radian 5 will keep little ones in a 5-point harness up to 25kg. Longer 5 point harness use prevents any seat belt escapes and misalignment when little ones are too young to understand the importance of the seatbelt.
The convertible forward and rear facing design of Radian 5 gives complete flexibility so the seat can be utilised in the best way that suits you and your lifestyle. With plush fabrics, memory foam padding and a longer seat base, Radian 5 ensures comfort on long trips as well as short journeys. Radian 5 also features removable washable covers and folds flat for convenience – another unique feature!
Radian 5 is also eligible for the Diono Lifetime Warranty which provides you with a guarantee against any manufacturing defects for the entire life of the seat. Registration is simple and free.
The complete all-in-one package, Radian 5 is the new revolution which provides optimal safety and functionality as well as complete convenience.
Suitable from birth with extended rear facing capacity to 25kg
Forward-facing 5-point harness capacity from 9kg up to 25kg
Full steel alloy frame creates the strongest car seat available
V3 Energy Reduction System provides ultimate protection in all collision situations –
forward, rear, side impact or overturning
SuperGrip energy absorbing harness pads significantly reduce the impact of crash forces to the child
Deep and straight side walls ensure maximum containment and comfort and provide complete
head to hip protection
Aluminum reinforced side walls and headrest resist crash forces
All round energy absorbing EPP foam
Engineered plastic shell for strength and durability
Fits up to 4 cup holders (1 included)
Easy care fabrics
Unique Safe Stop attachment to absorb more crash forces
Expandable sides and extendable headrest to grow with the child as they reach each milestone.
The first convertible car seat with a fold flat mechanism for easy storage and transport
Super soft fabrics with a cosy infant support cushion and head rest
Longer seat bottom for leg support and comfort
Memory foam seat padding
5 shoulder harness and 2 crotch strap positions for flexibility
Low profile seat base for easy boarding
Unique space saving design allowing more space across the back seat and the most amount of
internal space for the child
Width top – 45cm
Width bottom – 41cm
Height – 74cm
Depth (unfolded) – 39cm
Radian 5 is approved for use on an aircraft. The seat can be used forward facing for children from 9kg to 25kg. We always recommend installing a child car seat nearest the window to allow other passengers to get in and out of their seats. Due to the limited air cabin space and restriction for the passenger in front, Radian 5 cannot be used rear facing in an aircraft. Using Radian 5 forward facing allows for the table and entertainment screen to be used. Please download the installation instructions below. NOTE – the installation method is different to a car. A seatbelt shortener is recommended as it may be required depending on the type of aircraft to stop buckle crunch. These are available to purchase separately. We also recommend downloading the certificate to take with you for the flight. If you have purchased a Radian 5 already and need a sticker for your seat, please contact Diono Customer Services
Rear Facing Bolster
15-25kg Supergrip Harness Pads