Nuna AACE lx i-Size – The Car Seat That Grows with Your Child
It feels like our kids grow up overnight – good thing the Nuna AACE lx i-Size is built to grow with them. Thanks to its smart 3D Growth™ System, the seat adjusts in height, width, and depth – from around 3.5 to 12 years (100–150 cm). Your child will always ride safely, comfortably, and in style.
Custom Fit for Maximum Comfort
The headrest adjusts to 17 positions with just one hand. As you raise it, the shoulder width automatically expands – ensuring an ergonomic fit at every stage. The extendable seat depth offers three positions to support growing legs.
Sleek Design Meets Top Safety
The attachable side impact protection element and energy-absorbing EPP foam provide excellent crash protection. Color-coded belt guides make it intuitive and safe to use. The AACE lx is certified under i-Size ECE R129/03 and received a "Good (1.9)" rating from Stiftung Warentest, ADAC, and ÖAMTC (05/2023).
Parent-Friendly, Kid-Approved
Install the AACE lx using ISOFIX or the vehicle seatbelt. Its open design makes it easy for your child to get in and out and buckle up independently. The included cup holder keeps drinks secure and within reach. Plus, the soft, machine-washable cover ensures every ride is comfortable.
Awards for Design & Sustainability
iF Design Award 2022
Red Dot Design Winner 2021 & 2022
European Product Design Award
GREENGUARD GOLD Certified – for improved indoor air quality
Product Highlights
Usage: 100–150 cm (approx. 3.5 to 12 years)
Certification: i-Size (ECE R129/03)
Size: L 43–70 × W 45–57 × H 64–85 cm
Weight: 6.7 kg
17-position adjustable headrest
Automatic shoulder width adjustment
3-position extendable seat depth
Reclining backrest
Side impact protection & EPP foam
ISOFIX or seatbelt installation
What’s Included
Nuna AACE lx i-Size car seat
Clip-on side impact protection element
Practical cup holder
ISOFIX guides
User manual
With the Nuna AACE lx i-Size, you’re ready for every growth stage – with safety, comfort, and timeless design.
