Diono Radian 3R vs. UPPAbaby Knox: Which is Better? (2024)

Hi there! We're here to help you decide between the Diono Radian 3R and the UPPAbaby Knox.

Our goal is to provide you with the information you need to feel confident that you're choosing the optimal car seat for your family's needs and budget. Let us know if you have any other questions!

At A Glance

Our Thoughts

The Diono Radian 3R and UPPAbaby Knox are both worthy contenders in the market of convertible car seats for children, each boasting their own set of features that cater to different family needs.

The Diono Radian 3R is renowned for its slim profile and robust build. Its standout feature is its ability to fit three seats across in most vehicles - a significant advantage for families with multiple children who find the need to maximize backseat space. The Radian 3R offers functional versatility with rear-facing, forward-facing, and high-back booster seating options that accommodate a weight range of 5 lbs up to 100 lbs. This wide weight range allows parents to use the seat for an extended period, saving costs over time. The Diono Radian 3R gives considerable attention to safety with a steel frame construction, offering enhanced reliability and giving it high safety ratings. On the downside, its weight can make it challenging to move and install in compact vehicles. Plus, cleaning the seat cover can be cumbersome for some and the lack of head support may raise concerns for parents, particularly for side impacts.

On the other hand, with its luxury aesthetics and premium materials, the UPPAbaby Knox appeals to parents who prefer high-end styling. Safety is also a key consideration in the Knox's design, featuring integrated Koroyd technology and Side Impact Pods for advanced protection against impact. The seat can be used rear-facing for children weighing between 14 and 45 lbs, and forward-facing for those between 25 and 65 lbs. Although the weight ranges are narrower compared to the Radian 3R, it adequately covers the needs of most toddlers and younger children. The Knox's machine-washable fabric simplifies maintenance and aids in keeping the seat clean. However, it has its downsides. Its premium build comes with added bulk, making it a poor fit for smaller vehicles or scenarios that involve moving car seats between vehicles. Further, the complexity in its installation has been a common user complaint.

In choosing between the two, your decision rests on what you prioritize as a parent. If you have a smaller vehicle or more than one child to seat in the back, the slim yet robust Diono Radian 3R makes an excellent choice. Its versatility and extended weight range also mean you can use it longer as your child grows. However, if budget isn't a constraint and you favor a luxury look and style, alongside enhanced safety features, the UPPAbaby Knox might be appealing to you; provided that you get along well with its installation and do not need to squeeze in multiple car seats or move them frequently.