Diono Radian 3QXT SafePlus Convertible Car Seat
Diono Radian 3QXT SafePlus Convertible Car Seat
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The Diono Radian 3QXT Convertible Car Seat is the ultimate 3-across, all-in-one car seat. It transitions from infant car seat to booster seat and features advanced 4-in-1 newborn protection and all new Safe+ engineering to provide the next generation in car seat safety.
You'll love that is can grow with your child for ten years--from 4 to 120 lbs--and your child will love how comfortable it is, with tons of features to ensure maximum comfort, including a contoured,12-position headrest and Comfort+ memory foam cushioning.
Why Trust Baby Cubby?
Why Trust Baby Cubby?
Thousands of parents have trusted us for over 11 years. Here's why you can shop confidently with The Baby Cubby.
1. 11+ Years in business & two brick & mortar stores with consistent positive reviews. See our store here
2. We've helped over 100,000 families find products they love and trust
3. Price match guarantee + Free Shipping
4. Curated products and tested gear - we spend hundreds of hours training and learning so you don't have to.
5. Gear Experts - our team has created hundreds of how to's and product videos that have over 21 million views. We know gear and are here to help answer your questions.
6. Over 400k parents trust us on Instagram & social media for parenting, product tips and more.
7. Love your stroller guarantee - If you don't love it, return it within 60 days, even if used.
8. CPST's - more child passenger safety technician's on staff than any other specialty baby retailer in the USA. Be confident your child is safe in their seat.
9. Incredible service - we're parents too, you deserve to be treated like a person, not a dollar sign.
10. We've been featured by multiple news outlets and even by Google over the years, check out some of the press we've received here
11. Family owned & operated small business. When you shop with us you are supporting a small business that cares about its team members.
12. Nothing matters more than family, let us help your family find products you love and trust.
Best Price Guarantee
Best Price Guarantee
The product must be the exact same color/style/size and be in stock on competitor’s website. Unfortunately, we cannot price match auction-based websites and the seller must be an authorized distributor of the brand. Some brands and manufacturers are excluded from our price match policy.

Customer Service at hello@babycubby.com

when items are purchased at full retail price and the
merchandise (of the same style, color, and size) is
discounted within 14 days of the original purchase date.
not eligible for price adjustments.
Price adjustments are not provided during Black Friday or
Cyber Monday sales.
Car Seat Returns
Car Seat Returns
You can return your car seat within 30 days if it is unopened and unused. See our full return policy here.
Easy Returns within 30 days
Easy Returns within 30 days
You can return your car seat within 30 days if it is unopened and unused. See our full return policy here.
Shop Confidently - Talk to our Gear Experts
Shop Confidently - Talk to our Gear Experts
Gear Experts
Have Questions?
What is a CPST?

How does a CPS tech get certified?
Features
Features
- Adapts for 10 years of use, from infant to booster seat, rear and forward facing,
- Slim fit design for 3-across seating
- 4-in-1 newborn protection with Safe+ inserts
- Safe+ steel anti-rebound bar to reduce rebound rotation by 50%
- Steel-reinforced frame
- 8 layers of side-impact protection with side-impact management pod
- Diono SuperLATCH attachment
- One-hand, easy-adjust 12-position headrest
- Comfort+ memory foam cushion
- Machine washable cover
Rewards
Rewards
What's Included
What's Included
- Diono Radian 3QXT Convertible Car Seat
- Rear-Facing Base
- 4-Stage Newborn Inserts: Protection Insert, Travel High Wedge, 2-in-1 Infant Positioning Liner, Harness Pads
- Cup Holder
- SafePlus™ Steel Anti-Rebound Bar & Side Impact Management Pod
- Harness Pads and Lap Belt Cushion
Specifications
Specifications
Weight and Height Capacity
- Weight: 4-120 lbs
- Rear Facing: 4-50 lbs
- Rear Facing LATCH Maximum User Weight: 35 lbs
- Forward Facing: 22-65 lbs
- Forward Facing LATCH Maximum User Weight: 40 lbs
- Booster: 40-120 lbs
- Maximum User Height: 57.1"
Product Weight and Dimensions
- Weight: 32 lbs
- Dimensions: 28.5"H x 17"W x 16"D
- Folded Dimensions: 28.5"H x 17"W x 11.5"D
Installation Options
- Rigid LATCH
- Seat Belt Installation
Care Instructions
- Covers: Machine wash cold, line dry. Shell and Components: Spot clean
Compatibility + Accessories
Compatibility + Accessories
Accessories
- Radian Car Seat Travel Backpack
- Ultra Mat and Heat Sun Shield Car Seat Protector
- Radian Rear-Facing Angle Adjuster
- Radian XL Cup Holder - 2 Pack


