Diono car seats

26 Diono models listed in the US: 3 infant seats, 9 all-in-one seats, 4 high-back boosters, 6 2-in-1 boosters, 4 backless boosters. Limits and specifications were checked against Diono’s US site and manuals on September 17, 2026. Diono US site (opens in a new tab)

Diono car seat comparison table

Diono car seats compared: limits by mode, width, seat weight and usable life
Car seat	Fits child (lb)	Rear-facingRear	Forward-facingForward	BoosterBooster	Usable lifeLife	Aircraft
Radian 3QX SafePlusAll-in-one	4–120 lb	50 lb	65 lb	120 lb	10 yr	Certified
Radian 3QXT SafePlusAll-in-one	4–120 lb	50 lb	65 lb	120 lb	10 yr	Certified
Radian 3QXT FirstClass SafePlus (Radian 3QXT+)All-in-one	4–120 lb	50 lb	65 lb	120 lb	10 yr	Certified
Radian 3R SafePlusAll-in-one	4–120 lb	50 lb	65 lb	120 lb	10 yr	Certified
Radian 3RXT SafePlusAll-in-one	4–120 lb	50 lb	65 lb	120 lb	10 yr	Certified
Radian 3RXT SafePlus MaxAll-in-one	4–120 lb	50 lb	65 lb	120 lb	10 yr	Certified
Radian 3RAll-in-one	5–120 lb	50 lb	65 lb	120 lb	10 yr	Certified
Radian 3RXAll-in-one · discontinued	5–120 lb	50 lb	65 lb	120 lb	10 yr	Certified
Radian 3RXTAll-in-one · discontinued	5–120 lb	50 lb	65 lb	120 lb	10 yr	Certified
Connect3 R 2-in-12-in-1 booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Connect3 RBackless booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Connect3 RXT 2-in-12-in-1 booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Connect3 RXTBackless booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Cambria 2 2-in-12-in-1 booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Cambria 2XT 2-in-12-in-1 booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Everett NXTHigh-back booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Monterey 2XT 2-in-12-in-1 booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Monterey 4DXT 2-in-12-in-1 booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Monterey 5iST FixSafeHigh-back booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Monterey 6XT SafePlusHigh-back booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Monterey 6DXT SafePlusHigh-back booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
SolanaBackless booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
Solana 2Backless booster	40–120 lb	Not published	Not published	120 lb	8 yr	No
LiteClik30 R SafePlus Infant Car Seat and BaseInfant	4–30 lb	30 lb	Not published	Not published	8 yr	Certified
LiteClik30 XT SafePlus Infant Car Seat and BaseInfant	4–30 lb	30 lb	Not published	Not published	8 yr	Certified
LiteClik30 RXT SafePlus Infant Car Seat and BaseInfant	4–30 lb	30 lb	Not published	Not published	8 yr	Certified

Limits and specifications are each manufacturer’s own, checked September 17, 2026. A dash means the maker does not publish that number. A highlighted number is simply the highest or lowest value in this table, not a recommendation.

All Diono models

Fit my childWeight (lb)Height (in)Age (years)

Shows models with at least one mode whose published limits include all of these numbers. A mode with no published minimum age is not excluded by age. Always check every limit in the manual.

FAA approvedCurrent models only

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2-in-1 booster

Cambria 2 2-in-1 High-Back Booster

Manufacturer limits for Diono Cambria 2 2-in-1 High-Back Booster
Mode	Weight	Height
High-back booster	40–120 lb	38–63 in
Backless booster	40–120 lb	38–63 in

Seat weight: Not published
Width: Not published
Usable life: 8 years
Aircraft: Not certified

Mode	Weight	Height
Rear-facing harness	4–50 lb	18–44 in
Forward-facing harness	22–65 lb	30–57 in
Belt-positioning booster	40–120 lb	40–57 in

Mode	Weight	Height
Rear-facing harness	5–50 lb	18–44 in
Forward-facing harness	26.5–65 lb	30–57 in
Belt-positioning booster	40–120 lb	40–57 in