This child car seat has passed the regulatory tests required by ECE R129/i-Size to be sold as suitable for children from 40-125cm, which is from birth to around six years of age. But in our own tests, which are conducted at higher speeds and forces than the standard requires, this seat scores poorly for frontal-impact tests. The top of the crash test dummy’s head exceeded the top of the car seat shell, which could be dangerous, and the lap belt part of the vehicle seatbelt doesn’t sit properly across the hips when we crash-tested the seat using a larger dummy. We also identified issues with installation and fitting which could mean the seat is turned forward-facing too early or not used properly. Any car seat scoring 45% or less becomes a Which? Don't Buy.

Joiei-Spin Grow

i-Size baby to child
Harness or vehicle seatbelt
Extended rear-facing seat

£400Typical price

Test score

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The Joie i-Spin Grow car seat has, according to the manufacturer, been made to last. This i-size car seat is approved for use with children measuring 40cm (birth) to 125cm (approximately six years), and you can keep your child rearward-facing until they’re 105cm or four years old. Find out how this car seat performed in our crash tests, and whether it’s easy to install and comfortable for your baby, by reading the full review.

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What's included?

What is it?
How safe is it?
Is it easy to fit?
Is the seat comfortable?
Is there anything else I should know?
Should I buy it?
Where can I buy it?

Full Access first month £5, then £10.99 per month, cancel at any time

KEY TEST RESULTS
Safety rating
Fitting in car
Comfort of your child

Apr 2024Last checked by Which?
May 2022First reviewed by Which?
Nov 2021Released

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

How we test baby and child car seats

3 Jan 2024

Safety rating

How we test safety rating

The overall safety score is made up of the results of crash testing (front crash; side crash) seat design, stability in the car and belt routing. Our crash tests go beyond the legal minimum requirements for UK car seat regulations and are conducted at higher speeds and forces than the regulations require. We feel our tests more accurately reflect what could happen in a real life crash.

Fitting in car

Overall
Buckling up
Avoiding misuse and instructions
Cleaning
Space required in car

How we test fitting in car

Fitting and using includes: How easy it is to install the seat correctly in the car. How easy it is to strap a child securely into the seat. How well the seat is designed in order to prevent incorrect use. How easy the seat cover is to remove and wash. How little space the seat takes up in the car and how comfortable your child is in the seat.

Ergonomics

Overall
Comfort of your child

How we test ergonomics

Our experts conduct an ergonomic assessment of each seat to make sure your child will be in the best position when travelling, along with the level of padding and support. Our tests also reveal how much space this car seat takes up in the back seat of a car and how easy it is to get your child in and out of the seat. Plus, our eagle-eyed car seat experts will check whether this seat affects how much space any front passengers have. This assessment was introduced to our site in May 2015. If a seat does not have this score, it was tested before May 2015.

General
Height of child	40cm-125cm
Seat size	i-Size baby to child
Age group	Multigroup
Direction of travel	Reversible
Extended rear-facing seat	Yes
Installation type	Harness or vehicle seatbelt
Harness or shield seat	Harness
How is the child held in the seat?	5 point harness
Manufacturer URL	https://uk.joiebaby.com/

Features
Adult seat belt	Yes
Isofix integrated into seat	Yes
Isofix base	Yes
Belted base	No
Type of Isofix	Isofix and top tether
Swivel seat	Yes
Weight of seat (kg)	15.4kg
Weight of base (kg)	0kg
Part of a travel system?	No
Harness height adjustment	Moves with headrest
Recline	Six position
Adjustable headrest	Yes

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How we test baby and child car seats
We crash-test every baby, toddler and child car seat we review to reveal which ones give the best protection in a crash, and which you should avoid
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Joiei-Spin Grow