How to tell if your RF seat is outgrown

Jewels · 12-03-2007, 08:02 AM

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How to tell if your RF seat is outgrown by height:

It seems that how to tell when a RF (rear-facing) seat is outgrown is a fairly common question. It can be really hard to tell when a RF seat is outgrown, and a common misconception is looking from the front of the carseat to see if it is outgrown. The seat will pretty much always look outgrown from the front before it is truly outgrown because you need to look from the side.

This picture shows the correct way to measure. A line is drawn perpendicular to the shell/back of the carseat over the top of the child's head (#1). Then a second line is drawn out from the top of the shell parallel to the first line (#2).

Now measure the distance between the two lines. When there is *less than one inch*, the rearfacing restraint is outgrown by height.

This picture shows a common misconception with how people measure to check for the one inch rule. The line is drawn parallel to the ground from the top of the shell. You can see how this would appear to show the seat is outgrown, however it is incorrect to measure this way and this child still has room to grow in this seat.

The best place to measure how much room is left in the seat is when the seat is installed in the vehicle. They're usually more upright in the house and the more upright they are the more shell there will be above the child's head making your measurements not acurate.

*Disclaimer* This 1" rule works for all infant seats. Some convertibles allow you to have the head even with the top of the shell, refer to your manual.

**The pictures used in this article are used with permission by An Aurora.

CDNTech · 12-03-2007, 09:38 AM

Great article!

Mama! · 12-09-2007, 05:05 PM

Very cool.

Our scenera doesnt say anything about head height, so I was wondering.

Brilliantmama · 01-03-2008, 09:02 AM

what about seats with an adjustable headrest, like the BLVD?

Patriot201 · 01-04-2008, 06:09 PM

Jewels,

What a GREAT post this is! This will be SO helpful to MANY people!

I wish I could give you rep MANY times for this one!

brightredmtn · 01-04-2008, 10:53 PM

Quote:

Originally Posted by Jewels

*Disclaimer* This 1" rule works for all infant seats. Some convertibles allow you to have the head even with the top of the shell, refer to your manual.

My manual actually says nothing about height limits for RF.

Jewels · 01-06-2008, 10:56 AM

Quote:

Originally Posted by brightredmtn

My manual actually says nothing about height limits for RF.

I know the Britax MA allows the head to be even with the top of the shell. If you can't find it in the manual then I would call the company that makes your carseat and ask them.

An Aurora · 05-30-2008, 12:17 AM

Quote:

Originally Posted by Jewels

I know the Britax MA allows the head to be even with the top of the shell. If you can't find it in the manual then I would call the company that makes your carseat and ask them.

Just to clarify, the new 2008 Britax manuals now state that the child must have an inch of shell above the top of the head to RF in their convertibles. As far as I know, this is retroactive.

Pepse · 06-27-2008, 01:29 PM

very cool, thanks for sharing. I will have to measure dd when she wakes up from her nap

rosey2007 · 07-16-2008, 04:56 PM

Thank you for making that clear.

NannyMom · 01-30-2009, 08:19 AM

Maybe this is a silly question... but.... If DD's head is sitting against the back of the carseat, and I take a ruler and put it against the seat, and measure from the top of her head to the top of the seat.... that'll give the same measurement as in the first picture, right?

Pixels · 01-30-2009, 12:08 PM

Quote:

Originally Posted by NannyMom

Maybe this is a silly question... but.... If DD's head is sitting against the back of the carseat, and I take a ruler and put it against the seat, and measure from the top of her head to the top of the seat.... that'll give the same measurement as in the first picture, right?

As long as it's a ruler (not a cloth tape measure), and you make sure that you are measuring perpindicular to the shell. You want to avoid a tape measure because many shells round over at the edge, which would give a much higher measurement than what the child actually has.

tjham · 02-10-2009, 01:42 PM

Quote:

Originally Posted by Jewels

How to tell if your RF seat is outgrown by height:

It seems that how to tell when a RF (rear-facing) seat is outgrown is a fairly common question. It can be really hard to tell when a RF seat is outgrown, and a common misconception is looking from the front of the carseat to see if it is outgrown. The seat will pretty much always look outgrown from the front before it is truly outgrown because you need to look from the side.

This picture shows the correct way to measure. A line is drawn perpendicular to the shell/back of the carseat over the top of the child's head (#1). Then a second line is drawn out from the top of the shell parallel to the first line (#2).

Now measure the distance between the two lines. When there is *less than one inch*, the rearfacing restraint is outgrown by height.

This picture shows a common misconception with how people measure to check for the one inch rule. The line is drawn parallel to the ground from the top of the shell. You can see how this would appear to show the seat is outgrown, however it is incorrect to measure this way and this child still has room to grow in this seat.

The best place to measure how much room is left in the seat is when the seat is installed in the vehicle. They're usually more upright in the house and the more upright they are the more shell there will be above the child's head making your measurements not acurate.

*Disclaimer* This 1" rule works for all infant seats. Some convertibles allow you to have the head even with the top of the shell, refer to your manual.

**The pictures used in this article are used with permission by An Aurora.

Are there pictures like this is show when a seat is outgrown FF? (lines drawn to show top of ears in relation to top of shell?)

Jennifer mom to my 7 · 02-27-2009, 01:34 PM

Britax has them in there new manuals (minus the adorable model of course).

Page 6-7 of the new marathon manual, right in the initial warning sections.
http://www.britaxusa.com/uploads/pro...-guides/10.pdf

mommycat · 02-27-2009, 03:22 PM

Quote:

Originally Posted by Jennifer mom to my 7

Britax has them in there new manuals (minus the adorable model of course).

Page 6-7 of the new marathon manual, right in the initial warning sections.
http://www.britaxusa.com/uploads/pro...-guides/10.pdf

Wow, really - on the reclined shoulder level?? I didn't imagine it like that at all. But then again, the recline they are showing is pretty exaggerated, isn't it? So when you look at a kid in their seat you just look straight on and the little bit of recline doesn't "show up" when you are looking like it does in the picture.

Jennifer mom to my 7 · 02-27-2009, 06:19 PM

Quote:

Originally Posted by mommycat

Wow, really - on the reclined shoulder level?? I didn't imagine it like that at all. But then again, the recline they are showing is pretty exaggerated, isn't it? So when you look at a kid in their seat you just look straight on and the little bit of recline doesn't "show up" when you are looking like it does in the picture.

Right, pretty much I think their reclined level is if the seat is installed in recline level, which you cannot do over 33-35 pounds (not sure if the new manuals make a difference, the older 33 pound rf seats had a 33 pound recline limit when ff). As we know, if you can get a more upright install with a ff britax, the child gets more room

sparkyd · 03-12-2009, 08:25 AM

Quote:

Originally Posted by Brilliantmama

what about seats with an adjustable headrest, like the BLVD?

There was no answer posted to this question and I think it's a good one - I was wondering the same thing the other day.

Jeanum · 03-12-2009, 08:31 AM

Britax indicates there must be 1 inch of shell above the top of the rear facing child's head for determining if the Blvd. has been outgrown by height rear facing. There was a discussion of this in the online CEU chat held here with a rep. from Britax last year, and the Britax chat transcript is also posted here at or near the top of the Articles forum.

mommycat · 03-12-2009, 08:33 AM

So, 1" of shell and not headrest, yes?

Jeanum · 03-12-2009, 08:35 AM

Yes, shell.

12-09-2007, 05:05 PM	#3
Mama! CPS Fanatic Join Date: Sep 2007 Posts: 1,612	Re: How to tell if your RF seat is outgrown Very cool. Our scenera doesnt say anything about head height, so I was wondering. __________________ DS 542 lbs~44 inches FF in Regents DD 751 lbs-48.5 inches pink turbo or vivo

01-03-2008, 09:02 AM	#4
Brilliantmama Carseat Crazy Join Date: Aug 2007 Location: Adirondacks, NY Posts: 169	Re: How to tell if your RF seat is outgrown what about seats with an adjustable headrest, like the BLVD? __________________ Bridget, mama to Abigail 04/15/04 30lb 38in (FF Princess Radian) Georgianna 08/22/07 ~27lb 31in (RF Shannon BLVD) Maple Kate's coming in October (Strawberry Coccoro)

01-04-2008, 06:09 PM	#5
Patriot201 Car-Seat.org Ambassador Join Date: Jan 2006 Posts: 7,987	Re: How to tell if your RF seat is outgrown Jewels, What a GREAT post this is! This will be SO helpful to MANY people! I wish I could give you rep MANY times for this one! __________________ Common abbreviations used (by lovinwaves) “Nearly all the best things that came to me in life have been unexpected, unplanned by me.” ~Carl Sandburg Learning to cope with the unexpected...

06-27-2008, 01:29 PM	#9
Pepse Carseat Crazy Join Date: Apr 2008 Location: Ontario Posts: 672	Re: How to tell if your RF seat is outgrown very cool, thanks for sharing. I will have to measure dd when she wakes up from her nap

07-16-2008, 04:56 PM	#10
rosey2007 Carseat Crazy Join Date: Jul 2008 Posts: 465	Re: How to tell if your RF seat is outgrown Thank you for making that clear.

12-03-2007, 09:38 AM	#2
CDNTech CPS Technician Join Date: Feb 2007 Location: Alberta Posts: 4,590	Re: How to tell if your RF seat is outgrown Great article! __________________ Jen, Former CDN CRS Tech DS1 /02, Oto and passing the 5 Step Test in some vehicles! DS2 /05, ParkwaySG Newbie /12, Britax B-Safe... riding the roller coaster & waiting to see if we get to keep him

01-30-2009, 08:19 AM	#11
NannyMom CPS Technician Join Date: Jul 2008 Location: Maryland Posts: 7,285	Re: How to tell if your RF seat is outgrown Maybe this is a silly question... but.... If DD's head is sitting against the back of the carseat, and I take a ruler and put it against the seat, and measure from the top of her head to the top of the seat.... that'll give the same measurement as in the first picture, right? __________________ Mama to Sofi: 6.4yrs, 41LBs (44"), Harnessed in a RXT, Nautilus. Boostered in a Turbo, Vivo, Monterey, OS Parkway Nanny to BabyD, 12 months in a Keyfit

02-27-2009, 01:34 PM	#14
Jennifer mom to my 7 Senior Community Member Join Date: Dec 2008 Posts: 2,824	Re: How to tell if your RF seat is outgrown Britax has them in there new manuals (minus the adorable model of course). Page 6-7 of the new marathon manual, right in the initial warning sections. http://www.britaxusa.com/uploads/pro...-guides/10.pdf __________________ Whatever Wendy said "No one else will ever know the strength of my love for you, after all, you're the only one who knows what my heart sounds like from the inside." -Unknown

03-12-2009, 08:31 AM	#18
Jeanum Moderator - CPS Technician Emeritus Join Date: Mar 2006 Location: USA Posts: 13,583	Re: How to tell if your RF seat is outgrown Britax indicates there must be 1 inch of shell above the top of the rear facing child's head for determining if the Blvd. has been outgrown by height rear facing. There was a discussion of this in the online CEU chat held here with a rep. from Britax last year, and the Britax chat transcript is also posted here at or near the top of the Articles forum. __________________ Regards, Jean DD1 Age 11, 63" 5 steps/Harmony LiteRider DD2 Age 7, 53" Britax Parkway/Recaro Vivo Click here if you wish to view the full size version of my avatar

03-12-2009, 08:33 AM	#19
mommycat CPS Technician Join Date: Apr 2007 Location: NS, Canada Posts: 4,377	Re: How to tell if your RF seat is outgrown So, 1" of shell and not headrest, yes? __________________ Cat in Canada DS1 7 yo - 47 lbs (47"/??"t/??"top of head) - boostered in SKMonterey/2TBs/2CowmooPWSG/2HarmonyNBBs DS2 4 yo - 34.5 lbs (40"/15"t/??"top of head) - FF in CowmooMA/TrueFit/2Radians/2Nautiluses/HarmonyV7 Also in possession of: Graco SafeSeat1 and MyRide (loaned out) + 1 demo seat: SnugRide.

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How to tell if your RF seat is outgrown

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