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UPPAbaby

UPPAbaby Knox Convertible Car Seat/Rear Facing and Forward Facing/Intuitive Safety Features/Koroyd + CleanTech Technology/Removable Cup Holder Included/Jake (Charcoal)

Based on 375 reviews
Condition: New
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$349.99
Holiday Deal · 13% off was $399.99

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At a glance

Condition
New
Color
Jake (Charcoal)
Model
1120-KNX-US-JKE
Dimensions
23.8"D x 18.8"W x 32.5"H
Weight
32.5 lb
Material
Polyester
Installation Type
Seat Belt

Features 5

  • GROWS WITH YOU: The Knox Convertible Car Seat is for kids ages 16 yrs old, with rear-facing (1445 lbs) & forward-facing (2565 lbs) modes. The no-rethread harness, 8 position headrest, & 4 position recline adjust as your child grows.
  • SAFETY YOU CAN SEE: Our unique SmartSecure system technology, utilizing a tightness indicator & robust tension clips, provides a visual guide to aid in achieving a correct installation. Color-coded seatbelt paths make installation easy to understand.
  • CHEMICAL-FREE CHOICE: The Knox features both our SafeTech & PureTech fabrics & foam that are fire retardant chemical free. The Jordan & Gregory fashions, made with Merino Wool, keep kids cool on hot days, warm on cool days.
  • TETHER THEM BETTER: The Multi-Directional Tether reduces seat rotation & stress on the head & neck during an impact & is strongly recommended with rear & forward-facing installations. When rear-facing, the Tether can reduce injury potential by 45%.

Description

The knox's smart Secure system features an indicator window that turns from red to green when the seat is correctly installed. A multi-directional tether and the knox's energy response technology provide unparalleled safety and performance. The KNOX is the first child restraint to include koroyd technology designed to absorb the maximum amount of energy from an impact. Approximately: 1-6 years infant insert: 14-25 lbs. Rear-facing: 14-45 lbs. Forward-facing: 25-65 lbs. Height: up to 49" Fmvss 213 Max weight of child (lb) 65 min/Max weight of child 14-65 lbs. Seat height lowest position: - Seat bight to inner edge (highest point) of harness slot is 10" - Seat bight to top of headrest is 19" Seated height in highest position: - Seat bight to inner edge (highest point) of harness slot is 17.5" - Seat bight to top of headrest is 26".

Specs 27

Maximum Weight Recommendation 65 Pounds
Minimum Weight Recommendation 25 Pounds
Maximum Height Recommended 49 Inches
Rear Facing Maximum Weight 45 Pounds
Forward Facing Maximum Weight 65 Pounds
Rear Facing Minimum Weight 14 Pounds
Forward Facing Minimum Weight 25 Pounds
Rear Facing Car Seat Maximum Height 49 Inches

Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Best On The Market
As always, Uppababy’s products are top of the line. The car seat is easy to install and use, and feels solid, unlike cheaper brands. I am a research fiend when it comes to big buys for my kids and this one did not disappoint.
Reviewed in the United States on February 5, 2025 by Tara
Safe and Sturdy Safe and Sturdy
Review Image by Stephanie Nieri
It was time to upgrade our sons car seat as he’s outgrown his other one and we looked at many different options before deciding this was best. First, we trust uppababy brand. We have the infant car seat with the stroller and it was secure, safe, and easy to install. We loved our experience with the infant car seat, we figured we’d have a similar experience with the Knox. We love that you have recliner options for comfort and size. Few things to note though. One; your car size. This car seat is a big bigger (which we actually liked as it felt sturdy and safe) but we’ve been told it doesn’t fit in all cars. Two; it doesn’t have a swivel which we also liked as it seemed safer to us personally. If you have concerns on if it will fit in your car, we’ve been told customer service can help with those questions. We just ordered it and figured we’d try it first hand. All in all, great experience thus far and we’ve had it installed for a few weeks now. ... show more
Reviewed in the United States on April 4, 2024 Reviewed in the United States on April 4, 2024 by Stephanie Nieri
Be mindful of size
Color: Jake (Charcoal)
This product was very sturdy and fits within the uppababy brand well that we’ve come to love. Unfortunately this was just too large for our conventional family sedan. It was quite large for our Honda accord which made install a hot mess and It blocked the entire rear passenger window due to the high back design so we had to return it so if you have a small vehicle, I’d look elsewhere but I’d you have a larger car or big suv. This will work just fine for you ... show more
Reviewed in the United States on July 30, 2023 by Lizabeth Thompson
Well made but not the most comfortable and cupholders aren't great.
Color: Jake (Charcoal)
First of all Uppababy is a quality brand, no questions asked. We have all Uppa items for our 2 kids including infant and toddler seats as well as the vista stroller. Stroller is awesome with suspension etc. very smooth. This seat is well made, definitely beefy and seatbelts secure nicely, but our son now 3 seems to always complain on extended trips of his butt hurting. I've seen other reviews where their kids also complain of the same. We have a camper and tend to take 5 or so 3.5 hr plus trips a year plus a couple trips to VA which is 6 hrs. He definitely seems to always complain of his comfort at some point on every trip. It's not unbearable, but definitely something to note. Overall a decent seat, but the worst thing about it is the cupholders. The design is not well thought out, they click in on the sides depending on what side you want, and once the plastic softens up from being used, they just fall out. I ended up using electrical tape wrapped around the cupholder mounting tab on both seats we own to help keep them securely in the slot. That has helped, but shouldn't be necessary for the cost of these seats. ... show more
Reviewed in the United States on August 17, 2025 by Donny Warren
Our Favorite
This is our 2nd one for our other car. We love these. They are pretty bulky but super comfy and safe!!!
Reviewed in the United States on April 24, 2024 by Madi Frei
100% Recommend
Great car seat quality, very safe & fit. Have 2 of these Knox Car Seats for my boys in the color Noa & Jake love them both. Worth it! Looks very clean
Reviewed in the United States on November 16, 2024 by Isabel
Not a good car seat!
This car seat is huge and very heavy. It’s so tall it’s difficult to get my child into the seat without hitting her head on the frame of the car. It’s very difficult to move this car seat from one car to another due to the size and weight. Also there is very little head support every time she falls asleep her head falls all the way forward so her chin is resting on her chest this puts her neck in an uncomfortable position. We continue to have this issue no matter what we do. My daughters head constantly falls forward, which is unsafe for her neck and could cause her neck to be injured in a collision. Also, if you use this seat in the front facing position there is no leg room because the car seat is ridiculously huge. I had high expectations as we loved the stroller we got from uppababy but the car seat is not well designed. Not a good purchase. I hate this seat so so badly. ... show more
Reviewed in the United States on March 31, 2023 by Rachel
Large but does fit!
I rarely write reviews but I decided on this car seat because we loved our uppababy Mesa V2 so much. I have a relatively small car (Honda Fit) and many of the reviews on this car seat made me concerned it would not fit, with people saying they had issues in smaller cars. Sure it’s a big car seat, but most for babies and toddlers of this size are. It fit in my car just fine. I won’t comment on other functions of the seat since we have only used it a short time, but installation was easy and it fits just fine. ... show more
Reviewed in the United States on February 26, 2025 by Lane Brannam
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