The original and still the best since 2005
Introduced as the first ever 3-across car seat back in 2005. And it’s only gotten better since.
We’re a team of parents and caregivers, so we know the importance of protecting our family. And as a team of innovators, we created the solution to protect even busy back seats without any compromise to safety. Or style. Or comfort. Radian® is expertly engineered to meet the demands of growing families, and with our mega 3rd seat free promotion, featuring Radian® 3QXT and Radian® 3RX, we hope to welcome even more new faces to the 3-across family.
Get your 3rd Radian® 3QXT seat FREE when using our special offer coupon code at checkout: 3QXTFREE
Get your 3rd Radian® 3RX seat FREE when using our special offer coupon code at checkout: 3RDFREE
Safety. Style. Comfort.
Get your 3rd seat FREE when using our special offer coupon code
Radian® 3QXT
The ultimate 3 across All-in-One car seat from birth to booster.
Buy 2 Radian® 3QXT Car Seats and get 1 free - SAVE $449.99 *coupon code at checkout: 3QXTFREE*
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Radian® 3RX
Original slim fit 3 across all-in-one convertible
Buy 2 Radian® 3RX Car Seats and get 1 free - SAVE $299.99 *coupon code at checkout: 3RDFREE*
Shop NowTried, Tested and Loved.
By Kelsey V.
My 2 yr old is so excited about his new blue seat. He says it's comfortable and is now excited to get in it. Great timing as we're about to take a multi state road trip! The seat feels very solid and fits nicely in the back of our Tacoma. Will definitely buy another Diono when we add a second child.
By Jacqueline C.
The Diono Radian 3RX is very sleek, strong and easy to use for our toddler. She can get in and out easily and is very comfortable and safely protected. We love it and will be getting another for our 2nd vehicle!
By Margaret H.
It fits 3 across perfectly in my KIA Sorento with room to spare! Everyone is comfortable and safely strapped in. I have never been happier with a seat.