If you are looking for all-in-one convertible car seat that can fit 3 across in most vehicles, then Diono Radian 3QX and Radian 3RXT are two choices that should be mentioned. Both of Diono Radian 3QX and Radian 3RXT are both introduced by Diono as all-in-one convertible car seat that can fit 3 across in most vehicles. Diono Radian 3QX is the newer model than Diono Radian 3RXT although we can’t call Diono Radian 3QX as the successor model of Diono Radian 3RXT. To decide which of the them is the one to choose, let’s talk about comparison between Diono Radian 3QX and Radian 3RXT in this article.
What Should You Know about Diono Radian 3QX?

Diono Radian 3QX
Diono Radian 3QX is introduced as all-in-one convertible car seat that can be used in 3 different modes : rear-facing for 4-50 lbs infant with up to 44″ height, forward-facing harness for 22-65 lbs toddler with up to 57″ height and Highback booster for 40-120 lbs kid with 44″ – 57″ height. Diono Radian 3QX comes with slim fit design so that it can fits 3 across in most vehicles while still can provide advanced protection for your child. We can find Diono Radian 3QX is completed with Safe+ steel anti-rebound bar and Safe+ side impact protection. Safe+ steel anti-rebound bar is able to increased stability while also reduce rebound rotation by 50%. Safe+ side impact protection consists of 6 layers of interlocking energy-absorbing EPS/EPP foam, high density plastic and steel reinforcement to provide advanced side impact protection. Safe+ steel core frame is already integrated with Diono Radian 3QX to provide strength and durability. Superlatch system is integrated with Diono Radian 3QX that provide quick and easy installation. To keep your growing child comfortable, there are 12 positions adjustable headrest position in Diono Radian 3QX. Diono Radian 3QX is already completed with newborn travel high wedge to create lie-flat travel position. We can also find infant positioning liner to give support for the the growing infant. Diono Radian 3QX is a perfect choice for travelling since it can folds flat while it’s already certified to be used in aircraft. Since the cover of Diono Radian 3QX is removable as well as machine washable, we can easily clean this car seat when it gets dirty. Steel reinforced cup holder is available in Diono Radian 3QX that allows our child to access their drink during their time sitting on this car seat. You can check today’s price of Diono Radian 3QX on Diono.com here…
What Should You Know about Diono Radian 3RXT?

Diono Radian 3RXT
Diono Radian 3RXT also comes as 3-in-1 convertible car seat that can be used in rear-facing harness mode, forward-facing harness mode and Highback booster mode. Rear-facing harness mode is intended to be used by 5-50 lbs infant, forward-facing harness mode is for 22-65 lbs toddler while Highback booster is for 44-120 lbs kid. Diono Radian 3RXT already fits 3 across in most vehicles while still provides advanced protection for your child. Diono Radian 3RXT comes with Steel alloy frame and aluminum reinforced sides to provide strength and durability for its structure. It’s also completed with thick EPS energy absorbing foam to provide side impact protection. Superlatch system is integrated with Diono Radian 3RXT that allows us to install this car seat quickly. We can also find 12-position adjustable headrest in Diono Radian 3RXT that can accommodate our growing child. Newborn travel high wedge also can be found in Diono Radian 3RXT to make our newborn more comfortable during the trip. For growing infant support, we can also find 2-in-1 infant positioning liner in this car seat. For easy storage and portability, Diono Radian 3RXT can fold flat. It’s also already certified to be used in aircraft (harness mode only). We can easily clean Diono Radian 3RXT when it gets dirty since it already comes with removable seat pad that’s also machine washable. Our child is also able to easily access their drink during the trip since steel reinforced cup holder is available in Diono Radian 3RXT. You can check today’s price of Diono Radian 3RXT on Diono.com here…
Specs & Features Table
The key specs and features of Diono Radian 3QX and Radian 3RXT can be found in the specs & features table below. It’s important for us to look at their specs and features before we can talk more about their comparison.
Diono Radian 3QX | Diono Radian 3RXT | |
Brand | Diono | Diono |
Car Seat Type | Convertible Car Seat | Convertible Car Seat |
Ways to Ride | 3-in-1 | 3-in-1 |
Rear-Facing Harness Weight Limit | 4-50 lbs | 5-50 lbs |
Forward-Facing Harness Weight Limit | 25-65 lbs | 25-65 lbs |
Belt-positioning Booster Weight Limit | 40-120 lbs | 40-120 lbs |
SuperLatch System | YES | YES |
Side Impact Protection | 6 Layers | 3 Layers |
Safe+ Steel Anti-Rebound Bar | YES | NO |
Infant Positioning Liner | YES | YES |
Newborn travel high wedge | YES | YES |
Steel Frame | YES | YES |
Safe+ Engineering | YES | NO |
Fits 3 Across | YES | YES |
Folds Flat | YES | YES |
Certified for Aircraft Use | YES | YES |
Cup Holder | Steel Reinforced | Steel Reinforced |
Machine Washable Cover | YES | YES |
Price | Check Today’s Price (Diono.com)… | Check Today’s Price (Diono.com)… |
Comparison of Diono Radian 3QX and Radian 3RXT
From their specs & features table above, we can talk more about comparison between Diono Radian 3QX and Radian 3RXT.
Car Seat Usage
Both of Diono Radian 3QX and Radian 3RXT are introduced as all in one convertible car seat that can be used in 3 different modes : rear-facing harness, forward-facing harness and Highback booster. Their weight limit are quite similar. Rear-facing harness mode is designed for 4-50 lbs infant (Diono Radian 3QX) and 5-50 lbs (Diono Radian 3RXT), forward-facing harness mode is for 25-65 lbs toddler while Highback booster is for 40-120 lbs kid.
Car Seat Safety
Diono Radian 3QX and Radian 3RXT are both powered by steel core frame to provide strength and durability. We can also find that Side Impact Protection is already integrated with both Diono Radian 3QX and Radian 3RXT although they are different in layers of protection. Diono Radian 3QX comes with 6 layers of side impact protection that consists of interlocking energy-absorbing EPS/EPP foam, high density plastic and steel reinforcement while Diono Radian 3RXT only comes with 3 layers of side impact protection. Diono Radian 3QX is already Diono’s Safe+ engineering to give us more peace of mind since It’s already tested with the most rigorous crash tests.
We can already find that newborn travel high wedge and 2-in-1 infant positioning liner are available in both Diono Radian 3QX and Radian 3RXT. Newborn travel high wedge help us to create lie-flat travel position while 2-in-1 infant positioning liner provides support for your baby. Additionally, Diono Radian 3QX is completed with Safe+ steel anti-rebound bar. Safe+ steel anti-rebound bar is able to increase stability and reduces rebound rotation by 50% especially when we use this car seat in rear-facing mode.
Car Seat Features
SuperLatch System is integrated as the installation technology of Diono Radian 3QX and Radian 3RXT. It can provides secure installation in a quick installation time. There is also 12-position adjustable headrest in both of Diono Radian 3QX and Radian 3RXT that can accommodate our growing child. Both of Diono Radian 3QX and 3RXT can fit 3 across in most vehicles while still comfortable for our child to sit on it. They also can fold flat as well as certified to be used in aircraft so that they are good for travelling purpose.
The cover of Diono Radian 3QX and Radian 3RXT are removable as well as machine washable so that we can clean their cover conveniently when they get dirty. We can also find that both of Diono Radian 3QX and Radian 3RXT come with steel reinforced cup holder that allow our child to easily access their drink during the ride.
Price
When we look at the price of Diono Radian 3QX and Radian 3RXT, we can find that Diono Radian 3QX is usually offered at the higher price than Diono Radian 3RXT. To know their latest price difference, it’s necessary for us to check the price of Diono Radian 3QX and 3RXT since their price are changing from time to time.
Summary
After we talk about comparison between Diono Radian 3QX and Radian 3RXT, we can find that Diono Radian 3QX is better especially when we talk about safety. It already comes with Anti-Rebound Bar, more layers of side impact protection while it’s also already powered by Safe+ Engineering. We indeed usually need to spend more for Diono Radian 3QX since it’s higher in price. So if you don’t mind to spend more for better safety, then Diono Radian 3QX is the model that you should choose. Where’s recommended place to order one? You should Order Diono Radian 3QX directly from Diono.com here…
Diono Radian 3RXT is similar to Diono Radian 3QX in many aspects. It’s basically similar in usage as well as many features. Diono Radian 3RXT is indeed less advanced when it comes to safety since it’s not completed with Anti-Rebound bar while it’s also less in side impact protection layers. Diono Radian 3RXT is also not powered by Safe+ Engineering. When it comes to price Diono Radian 3RXT is usually lower in price than Diono Radian 3QX. So if you have more limited budget, Diono Radian 3RXT is a good alternative choice for you. Where should you order one? We recommend you to Order Diono Radian 3RXT directly from Diono.com here…
Tags: Convertible Car Seat