3 Rear Facing Car Seats

[McMoo]

It can be done. One Diono Radian and 2 Combi Cocorro seats. I’m 6’2” and barely fit comfortably as the driver with a coccoro behind me. My wife is 5’6” and is comfortable in the passenger seat. I can fit for short drives in the passenger seat.

The issue I see is when 2 are in car seats and one is in a booster it will be impossible for the kid in the booster to buckle up.

Hopefully this gives someone else some hope!

 

[UncertainTimes]

Time for a Model Y/X

 

[McMoo]

Time for a Model Y/X

I’m good for now! A Rivian R1S is the most likely replacement.

 

[pnwadventures]

I’m good for now! A Rivian R1S is the most likely replacement.

If it ever goes on sale. I’d buy one as well.

 

[UncertainTimes]

If it ever goes on sale. I’d buy one as well.

I hear Lordstown is making a EV pickup.

 

[LionXng]

The issue I see is when 2 are in car seats and one is in a booster it will be impossible for the kid in the booster to buckle up.

https://www.seatbeltextenderpros.com/tesla-model-3-seat-belt-extender/

 

[McMoo]

https://www.seatbeltextenderpros.com/tesla-model-3-seat-belt-extender/

Not at all safe to use for children.

Seat Belt Extenders - The Car Seat Lady

Seat Belt Extenders are NOT safe to use with any car seat or booster. They're ONLY for obese adults whose size makes it impossible to otherwise buckle up.

thecarseatlady.com

 

[LionXng]

Not at all safe to use for children.

Seat Belt Extenders - The Car Seat Lady

Seat Belt Extenders are NOT safe to use with any car seat or booster. They're ONLY for obese adults whose size makes it impossible to otherwise buckle up.

thecarseatlady.com

Thanks for the information. According to your link seat belt extenders are not safe to use because:

-"Extenders are not generic"
The site I linked agrees and gives you a completely specific extender.

-"In a crash everything becomes much heavier due to the G-forces (force of gravity). You'll effectively weigh your usual weight times however many G's are in the crash. In a 30mph crash like they use to crash test car seats, there are about 25 G's. A 250 pound adult in a crash with 25 G's is going to feel like they weigh 6,250 (250 x 25 = 6,250). Their body will put 6,250 pounds of force on the seat belt and the extender."
Force = mass * acceleration. A smaller mass means a lower force. So if it works for an obese adult(250x25=6250) it will also work for a small person (40*25=1000). So it doesn't make any sense to say it is safe for a obese adult but not someone smaller.

-"If you get a seatbelt extender from a specific vehicle manufacturer - let's say Ford, for example - you can not assume it will work in all Ford vehicles. The Ford Taurus may use a different seat belt buckle than the Ford Explorer - and therefore the extender would be different for these two Ford vehicles"
Yes, get the correct specific extender. Tesla even has different buckles between the rear middle and rear side seats.

-"Extenders can change the geometry of the seat belt on the body." "... As the female end gets longer it moves the buckle from the side of your hip (where it should be) farther and farther towards the middle of your body. As the buckle moves closer to the center of your body, the shoulder belt moves farther out of position, sliding onto your arm instead of resting on your collar bone..."
A full back booster seat already places the seat belt in the proper shoulder position for a child so this possibility only applies to a backless booster IMO. And with all booster seats the instructions tell you to check the shoulder belt position.

Unmentioned is the extender is another point of failure in the safety system. Obviously the more points of failure the greater the chance of failure. But since the argument against their safety is based on buying the wrong one and shoulder position being altered I still don't agree with the statement they are not at all safe to use for children as both of those can be negated.

 

[father_of_6]

The car seat lady seems to be saying "They're ONLY for obese adults whose size makes it impossible to otherwise buckle up".

This statement "So if it works for an obese adult(250x25=6250) it will also work for a small person" *may* not be true. Perhaps the extender *won't* work for an obese adult at that G-force. Maybe using the extender is better than *nothing*, which is what an obese adult would have without using the extender.

Perhaps it's a bad choice trying to convince a stranger to use a seat belt extender for their children.