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Diono Radian 3QXT SafePlus
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Our Review of the
Diono Radian 3QXT SafePlus
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Our recommendation: From 2 months until the seat is outgrown (average 7-8 years old)
A 3-in-1 car seat that can be used rear-facing, forward-facing, and in high-back booster mode
From 2+ months
Stand Out Features of this Car Seat
Anti-Rebound Bar
Narrow
Seat is Good for You If:
You need to fit 3 across
Use Caution if:
You want a seat that's easy to install.
You want a seat that's easy to use.
Child Fit Information
Installation Information
Airplane Use
This seat is FAA-approved.
Check out our full list of car seats for Airplane Travel here: FAA Approved Car Seats.
For help with all things airplane travel and car seats, check out our newest resource: Safe in the Sky.
SITS Bottom Line
Videos
Similar Car Seats
Specifications
Diono
Product Information
Weight: 32lbs
Width: 17"
Highest Harness Height: 17"
Rear Facing Limits
Height: 18-44"
Weight: 4-50lbs
Head Height Rules: at least 1.5″ below the top of the headrest
Lower Anchor Connectors Weight Limit: 35lbs
Forward-Facing Limits
Height: 30-57"
Weight: 22-65lbs
Head Height Rules: ears must be below the top of the headrest
Lower Anchor Connectors Weight Limit: 40lbs
No Back Booster Limits
Highest Belt Guide Settings
19"
High Back Booster Limits
Height: 40-57"
Weight: 40-120lbs
Head Height Rules: ears must be below the top of the headrest
Other Important Details
Newborn Fit
not recommended; lowest harness height is too high for many newborns
Expiration Limit
8 years in harness mode, 10 years in booster mode
Crash Replacement Policy
replace after a moderate or severe crash
Harness
rethread
Lock-off
no
Vehicle Seat Protectors
This brand allows Diono mats:
Diono Grip It Car Seat Protector