SeatFitFindercar seats, by spec

Extended rear-facing car seats

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Rear-facing weight limits of ~40-50 lb so a child can stay rear-facing (the safest position) well past age 2.

Short answer: Going by each maker's manual, the highest rear-facing limit here is 50 lb (13 of the 22 seats). The forward-facing harness goes up to 65 lb, high-back booster mode up to 120 lb on the 14 seats that have it, and backless booster mode up to 120 lb on the 2 seats that have it. Useful life is 8 to 12 years where the manual gives one.

Fit is decided by your seat manual + your vehicle manual. This page lists published specs to help you shortlist — it is not installation or safety advice, and it does not confirm a seat fits a specific car. Confirm install with the manuals, NHTSA, or a free certified car-seat technician (CPST) check.

Last verified 2026-06-11 · 22 models

These keep a child rear-facing longer — but which still fit your child today? Open the calculator with this filter applied →

Type a weight and height; it lists only seats whose published manufacturer limits cover those numbers, with the manual cited. It never ranks seats or judges safety.

Car seatStageNarrow (3-across)Ext. rear-facingFAALightweightBuy
Graco Extend2FitConvertible4–65 lbNHTSA notice 2016Convertible–✓✓–See price
on Amazon
Chicco NextFit MaxConvertible4–65 lbConvertible–✓✓–See price
on Amazon
Nuna RAVAConvertible5–65 lbNHTSA notice 2024Convertible–✓✓–See price
on Amazon
Clek FoonfConvertible14–65 lbNHTSA notice 2021Convertible✓✓––See price
on Amazon
Clek FlloConvertible14–65 lbNHTSA notice 2021Convertible✓✓✓–See price
on Amazon
Diono Radian 3QXTConvertible4–120 lbConvertible✓✓✓–See price
on Amazon
Diono Radian 3RXTConvertible5–120 lbConvertible✓✓✓–See price
on Amazon
Graco 4Ever DLX 4-in-1All-in-one4–120 lbAll-in-one–✓✓–See price
on Amazon
Britax One4Life ClickTightAll-in-one5–120 lbAll-in-one–✓✓–See price
on Amazon
Graco TriRide 3-in-1All-in-one5–100 lbAll-in-one–✓✓–See price
on Amazon
Chicco Fit4 4-in-1All-in-one4–100 lbAll-in-one–✓✓–See price
on Amazon
Evenflo EveryStage DLXAll-in-one4–120 lbAll-in-one–✓✓–See price
on Amazon
Evenflo Revolve360 SlimConvertible4–65 lbNHTSA notice 2025Convertible–✓––See price
on Amazon
Graco Grows4Me 4-in-1All-in-one5–110 lbAll-in-one–✓✓–See price
on Amazon
Safety 1st Grow and Go All-in-OneAll-in-one5–100 lbAll-in-one–✓✓–See price
on Amazon
Evenflo Revolve360 ExtendAll-in-one4–120 lbAll-in-one–✓––See price
on Amazon
Maxi-Cosi Magellan LiftFitAll-in-one5–100 lbAll-in-one–✓✓–See price
on Amazon
Chicco NextFit ZipConvertible5–65 lbConvertible–✓✓–See price
on Amazon
Graco Sequel 65Convertible4–65 lbConvertible–✓✓–See price
on Amazon
Cybex Eternis SConvertible4–120 lbConvertible–✓✓–See price
on Amazon
Nuna EXECAll-in-one5–120 lbAll-in-one–✓✓–See price
on Amazon
Evenflo Symphony DLXAll-in-one5–110 lbAll-in-one–✓✓–See price
on Amazon

Weight limits and useful life, seat by seat

The weight ranges each maker prints in the seat's manual. Tap a seat to see it side by side with a similar model, with height limits and a link to its manual.

Car seatRear-facingForward-facing harnessHigh-back boosterBackless boosterUseful life
Graco Extend2Fit4–50 lb22–65 lb——10 yrs
Chicco NextFit Max4–50 lb22–65 lb——8 yrs
Nuna RAVA5–50 lb25–65 lb——10 yrs
Clek Foonf14–50 lb26.5–65 lb——9 yrs
Clek Fllo14–50 lb26.5–65 lb——9 yrs
Diono Radian 3QXT4–50 lb22–65 lb40–120 lb—10 yrs from purchase
Diono Radian 3RXT5–50 lb22–65 lb40–120 lb—10 yrs from purchase
Graco 4Ever DLX 4-in-14–40 lb22–65 lb40–100 lb40–120 lb10 yrs
Britax One4Life ClickTight5–50 lb30–65 lb40–120 lb—10 yrs
Graco TriRide 3-in-15–40 lb22–65 lb40–100 lb—10 yrs
Chicco Fit4 4-in-14–40 lb25–65 lb40–100 lb—10 yrs
Evenflo EveryStage DLX4–50 lb22–65 lb40–120 lb——
Evenflo Revolve360 Slim4–50 lb22–65 lb———
Graco Grows4Me 4-in-15–40 lb22–65 lb40–100 lb40–110 lb10 yrs
Safety 1st Grow and Go All-in-One5–40 lb30–65 lb40–100 lb—10 yrs
Evenflo Revolve360 Extend4–50 lb22–65 lb40–120 lb——
Maxi-Cosi Magellan LiftFit5–40 lb22–65 lb40–100 lb—12 yrs
Chicco NextFit Zip5–40 lb22–65 lb——8 yrs
Graco Sequel 654–40 lb22–65 lb——10 yrs
Cybex Eternis S4–50 lb22–65 lb40–120 lb——
Nuna EXEC5–50 lb25–65 lb40–120 lb—10 yrs
Evenflo Symphony DLX5–40 lb22–65 lb40–110 lb——

“—” means the manual we cite gives no figure for that mode. Useful life counts from the date of manufacture unless it says “from purchase”. How these are sourced

Common questions

Which extended rear-facing car seats have the highest rear-facing weight limit?

The Graco Extend2Fit, the Chicco NextFit Max, the Nuna RAVA, the Clek Foonf, the Clek Fllo, the Diono Radian 3QXT, the Diono Radian 3RXT, the Britax One4Life ClickTight, the Evenflo EveryStage DLX, the Evenflo Revolve360 Slim, the Evenflo Revolve360 Extend, the Cybex Eternis S and the Nuna EXEC list a rear-facing limit of 50 lb, the highest here. The lowest is 40 lb (the Graco 4Ever DLX 4-in-1, the Graco TriRide 3-in-1, the Chicco Fit4 4-in-1 and 6 more). These are the makers' printed limits; your child's height also has to fit.

How heavy can a child be in the forward-facing harness?

All 22 seats here with a forward-facing harness list 65 lb as the harness limit.

Up to what weight can these be used as a booster?

In high-back booster mode the maximum is between 100 and 120 lb; the Diono Radian 3QXT, the Diono Radian 3RXT, the Britax One4Life ClickTight, the Evenflo EveryStage DLX, the Evenflo Revolve360 Extend, the Cybex Eternis S and the Nuna EXEC go to 120 lb. As a backless booster the maximum is between 110 and 120 lb. A booster also needs the seat belt to fit your child, so check the height range in the manual too.

How long do extended rear-facing car seats last before they expire?

The manuals list a useful life of 8 to 12 years. Most count from the date of manufacture; the Diono Radian 3QXT and the Diono Radian 3RXT count from the date of purchase. For 5 of the 22, the manual we cite gives no figure, so check the label on the seat. More by brand on car seat expiration.

Which of these extended rear-facing car seats are narrow enough for 3-across?

4 of the 22 are made narrow for fitting three across: the Clek Foonf, the Clek Fllo, the Diono Radian 3QXT and the Diono Radian 3RXT. Whether three fit depends on your back seat, so test-fit in your car.

Which of these extended rear-facing car seats can be used on a plane?

19 of the 22 are FAA-approved for use on aircraft: the Graco Extend2Fit, the Chicco NextFit Max, the Nuna RAVA, the Clek Fllo, the Diono Radian 3QXT, the Diono Radian 3RXT, the Graco 4Ever DLX 4-in-1, the Britax One4Life ClickTight, the Graco TriRide 3-in-1, the Chicco Fit4 4-in-1, the Evenflo EveryStage DLX, the Graco Grows4Me 4-in-1, the Safety 1st Grow and Go All-in-One, the Maxi-Cosi Magellan LiftFit, the Chicco NextFit Zip, the Graco Sequel 65, the Cybex Eternis S, the Nuna EXEC and the Evenflo Symphony DLX. Boosters are never approved for planes, because a plane seat has no shoulder belt.

Browse by stage · other needs: Narrow / 3-across · Lightweight / travel · FAA-approved (flying) · Converts as they grow