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Description The original 3 Across All-In-One™ convertible car seat. Up to 10 years of use with 12 SafePlus® upgrades. Features: 10 Years 1 Car Seat® - from Birth to Booster (4 - 120 lb) it's... Our best-selling and most loved 3 Across All-In-One™ convertible car seat, now improved. Up to 10 years of use, optimized safety and new 2-in-1 anti-rebound bar and calf support, the...
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Other Details
  • product_care: Covers: Machine wash cold, dry flat. Shell and Components: Spot clean
  • Minimum User Weight: 4 lb
  • Maximum User Weight: 120 lb
  • Minimum User Weight - Rear Facing: 4 lb
  • Maximum User Weight - Rear Facing: 50 lb
  • Maximum User Weight - Rear Facing LATCH: 35 lb
  • Minimum User Weight - Forward Facing: 22 lb
  • Maximum User Weight - Forward Facing: 65 lb
  • Maximum User Weight - Forward Facing LATCH: 40 lb
  • Minimum User Weight - Booster: 40 lb
  • Maximum User Weight - Booster: 120 lb
  • Maximum User Height: 57.1 in
  • Product Height: 28.5 in
  • Product Width: 17 in
  • Product Depth: 16 in
  • Product Height - Folded: 28.5 in
  • Product Width - Folded: 17 in
  • Product Depth - Folded: 11.5 in
  • Seat Weight: 29.3 lb
  • Number of Head Support Positions: 12
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  • product_subtitle: The original 3 Across All-In-One™ convertible car seat with SafePlus® engineering
  • product_faq_included: Car Seat, Product Manual, Safe Stop®, Lap Belt Cushion, Anti-Rebound Bar, Rear-Facing Base, Cup Holder, Harness + Buckle Pads
  • product_faq_recommended: We recommend the following Diono® Accessories: Angle Adjuster®, Car Seat Travel Backpack, Side Impact Management Pod, Anti-Rebound Bar Cover, Ultra Mat™, Easy View Mirror®
  • product_faq_radian3r_safeplus_manual: Yes, you should always read your Radian® 3R® product manual and the vehicle's manual that you plan to install it in before use and is sewn into the seat cover. Find more information in our safety hub here.
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  • product_faq_radian_3r_safeplus_manual_where: Your manual is attached to the seat when you open the box. After you have read the manual it must be stored in the storage compartment on the back of the seat. Look for the manual storage icon to locate the manual.
  • product_faq_radian_3r_radian_3r_safeplus_difference: The Radian® 3R® SafePlus® has 15 upgrades from the Radian® 3R®. These include SafePlus® side impact protection, a 12 position easy-adjust headrest, an easy fix rear-facing base, and many more.
  • product_faq_radian_3r_safeplus_newborn: Yes, your Radian® 3R® SafePlus® is entirely suitable for a newborn. We recommend rear-facing from 5 lb to 50 lb as this is the safest way for a young child to travel.
  • product_faq_radian_3r_safeplus_toddler: Yes, your Radian® 3R® SafePlus® is suitable for your toddler. We recommend rear-facing up to 50 lb/forward-facing from 50 lb to 65 lb in the 5-point harness system.
  • product_faq_radian_3r_safeplus_bigkid: Yes you can use your Radian® 3R® SafePlus® for your big kid. We recommend forward-facing in the 5-point harness until 65 lb and then as a high back booster up to 120 lb.
  • product_faq_space_saving_included: When installing your Radian® 3R® SafePlus® rear-facing in some vehicles, the space-saving Angle Adjuster® can make more space available behind the front seat. Check out the video here.
  • product_faq_radian_3r_safeplus_accessories: Only use Diono® approved and crash-tested accessories with your Radian® 3R® SafePlus®. The accessories you can use are here.
  • product_faq_radian_3r_safeplus_flat: Diono® is the only car seat manufacturer to offer a folding convertible car seat. This makes it the perfect travel seat as it is so compact and folds into a handy car seat travel backpack. Saving space for trunk or home storage.
  • product_faq_car_space: 51 in is the minimum vehicle seat width needed between the vehicle's interior structures to fit your Radian® 3R® SafePlus®. The Radian® fits 3-across in most mid-sized Sedans up. Learn more here.
  • product_faq_radian_3r_safeplus_rear: Your Radian® 3R® SafePlus® can be used rear-facing up to 50 lb or 44 in height. We encourage rear-facing as long as possible since it is the safest way for children to travel!
  • product_faq_radian_3r_safeplus_forward: You can use your Radian® 3R® SafePlus® until 65 lb forward-facing with the 5-point harness and then until 120 lb as a high back booster.
  • product_faq_radian_3r_safeplus_space: Your Radian® 3R® SafePlus® uses 30-36 in between the vehicle's backseat and front seat back, depending on the vehicle's seat shape and contour. Fitting in most vehicles' rear-facing, use our space-saving Angle Adjuster® if more space is needed.
  • product_faq_radian_3r_brands: No. Always follow our guidelines regarding use of items not included with the car seat. We only recommend the use of accessories and spares parts from Diono® as all of these have been tested for use with your Radian® 3R® SafePlus®.
  • product_faq_radian_3r_safeplus_cupholder: Your Radian® 3R® SafePlus® does come with a cup holder. They are easy to install through the cup holder slot in the seat cover. Simply insert and twist to lock. Learn more here.
  • product_faq_safeplus: At Diono's Headquarters, a team of engineers continually work on improvements to our car seats. SafePlus® engineering is the latest advancement in materials and rear and side impact protection, thoroughly tested and built into many of our car seats.
  • product_faq_rebound: The Radian® 3R® SafePlus® must be used rear-facing. It works by reducing the rear ward rotation in the event of an accident by up to 50% which protects your child.
  • product_faq_sideimpact: The SafePlus® side impact pod is a safety feature that can be installed on the car seat side closest to the car door. It works by redirecting side impact crash force energy away from the seat and the child.
  • product_faq_flame_retardents: Our car seat fabrics are tested to ensure they do not contain any legally restricted harmful flame retardants. In order to meet Federal and Canadian Motor Vehicle Safety Standards for flammability, our car seat fabrics do contain flame retardants.
  • product_faq_radian_3r_safeplus_nhtsa: Safety is paramount. Diono® ensures compliance with US Federal Motor Vehicle Safety Standards (FMVSS), US National Highway Traffic Safety Administration (NHTSA), and Canadian Motor Vehicle Safety Standards (CMVSS), regularly testing all car seats.
  • product_faq_radian_3r_safeplus_expire: All Diono® convertible car seats have a life span of 10 years, starting from the date you purchase your seat. In the event the date of purchase cannot be determined then we use the date of manufacture.
  • product_faq_radian_3r_safeplus_built: Each Radian® is hand built by our manufacturing partners overseen by our highly trained quality control team.
  • product_faq_radian_3r_safeplus_heavy: Your Radian is heavy as our engineers will never compromise on the intergity of the famous Diono Steel core. Since launch our reinforced automotive grade high strength steel core is the heart of our Radian, protecting generations of kids everyday.
  • product_faq_radian_3r_safeplus_low: Your Radian® has a low seat base because as your child grows, they will want to get in and out of your car themselves. This low height makes it very easy for them to get into their seat before you harness them up.
  • product_faq_radian_3r_safeplus_expand: The seat sides on the base expand as your child grows. Parents and Kids really love this feature on the Radian® 3R® SafePlus® as it makes travel so much easier
  • Cup Holders: Yes
  • Fits 3-Across: Yes
  • FAA Approved: Yes
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  • product_subtitle: Our best-selling car seat, now with improved safety features
  • product_care: Covers: Machine wash cold, line dry. Shell and Components: Spot clean
  • Minimum User Weight: 4 lb
  • Maximum User Weight: 120 lb
  • Minimum User Weight - Rear Facing: 4 lb
  • Maximum User Weight - Rear Facing: 50 lb
  • Maximum User Weight - Rear Facing LATCH: 35 lb
  • Minimum User Weight - Forward Facing: 26.5 lb
  • Maximum User Weight - Forward Facing: 65 lb
  • Maximum User Weight - Forward Facing LATCH: 40 lb
  • Minimum User Weight - Booster: 40 lb
  • Maximum User Weight - Booster: 120 lb
  • Maximum User Height: 57.5 in
  • Product Height: 28.5 in
  • Product Width: 17 in
  • Product Depth: 16 in
  • Product Height - Folded: 28.5 in
  • Product Width - Folded: 17 in
  • Product Depth - Folded: 11.5 in
  • Seat Weight: 31.9 lb
  • Number of Head Support Positions: 12
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  • product_faq_included: Radian® 3RXT® SafePlus™ Max Car Seat, Anti-Rebound Panel, Rear-Facing Base, Comfort Harness Pads, Side Impact Management Pod, comfort Insert, Cup Holder, Crotch Buckle Cover, Car Seat Manual and Registration Cards
  • product_faq_recommended: Accessories that pair well with the Radian® 3RXT® SafePlus™ Max include: The Ultra Mat, Stow n’ Go, Easy View Mirror and See Me Too Mirror.
  • product_faq_brands: No. Always follow our guidelines regarding use of items not included with the child restraint. We only recommend using accessories and spare parts from Diono® as all of these have been tested for use.
  • product_faq_manual: Yes, you should always read your Radian® 3RXT® SafePlus™ Max product manuals and the vehicle's instruction manual that you plan to install it in before use. Find more information here.
  • product_faq_radianmanual: Your manual is attached to the seats harness straps when you open the box. After you have read it, you must store the car seat manual in the storage compartment flap on the backside of the seat.
  • product_faq_car_seat_newborn: Yes, you can use your Radian® 3RXT® SafePlus™ Max for a newborn. We recommend rear-facing from 5 to 50 lb, about 4 years old. Radian® 3RXT® SafePlus™ Max comes with an infant positioning liner and travel high wedge that you can use for your newborn.
  • product_faq_car_seat_toddler: Yes, you can use your Radian® 3RXT® SafePlus™ Max car seat for your toddler. We recommend rear-facing until 50 lb and then forward-facing from 50 lb to 65 lb forward-facing in the 5-point harness.
  • product_faq_car_seat_big_kid: Yes, you can use your Radian® 3RXT® SafePlus™ Max for your big kid. We recommend forward-facing in the 5-point harness until 65 lb and then as a high back booster until 120 lb.
  • product_faq_3_across: Minimum of 51 in is needed between the car's interior structures to fit your Radian® 3RXT® SafePlus™ Max. Radian® car seats fits 3-across in most mid-sized sedans. Learn more here.
  • product_faq_rebound: The anti-rebound panel reduces rearward rotation of the car seat by up to 50% in the event of a crash. This ensures your child stays protected after the primary impact of the collision.
  • product_faq_flame: Our car seat fabrics are tested to ensure they do not contain any legally restricted harmful flame retardants. We do not use Brominated or Chlorinated flame retardants in any of our car seats.
  • product_faq_regulations: Safety is paramount. Diono® ensures compliance with US Federal Motor Vehicle Safety Standards (FMVSS), US National Highway Traffic Safety Administration (NHTSA), and Canadian Motor Vehicle Safety Standards (CMVSS), regularly testing all car seats.
  • product_faq_radianrearface: Your Radian® 3RXT® SafePlus™ Max can be used rear-facing up to 50 lb or 44 in. We encourage rear-facing as long as possible since it is the safest way for children to travel!
  • product_faq_car_seat_forwardfacing: You can use your Radian® 3RXT® SafePlus™ Max until 65 lb forward-facing with the 5-point harness and then until 120 lb as a high-back booster.
  • product_faq_radianrearfacespace: Your Radian® 3RXT® SafePlus™ Max uses 30-36 in between the vehicle's backseat and front seat back, depending on the vehicle's seat shape and contour.
  • product_faq_carseat_lifetime: The Radian® 3RXT® SafePlus™ Max has a life span of 10 years, starting from the time of purchase. If the date of purchase cannot be determined, then we use the date of manufacture.
  • product_faq_radian_heavy: Your Radian® is heavy due to Diono®'s commitment to safety with our reinforced automotive-grade high-strength steel core. Since it's launch, Radian®'s core has been protecting generations of kids daily.
  • product_faq_radianfold: Diono® is the only car seat manufacturer to offer a folding convertible car seat. This makes it the perfect travel seat as it is so compact and folds into a handy car seat travel backpack.
  • product_faq_radian_low: Your Radian® has a low seat base because as your child grows, they will want to get in and out of your car themselves. This low height makes it very easy for them to get into their seat before you harness them up.
  • product_faq_radian_3r_sidewing_expand: The side wings on the base expand as your child grows. Parents and Kids really love this feature on the Radian® 3RXT® SafePlus™ Max as it makes travel so much easier.
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