Skip to main content
3rd Seat Free

3rd Seat Free

1 mega-deal. 2 seats to choose from. 3rd Seat Free.

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*

Shop Now

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 Now

Tried, 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.