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The new limits across the board is max 65 combined pounds. Where it used to be all cars were different, some having been more & I think some advised less.

I have heard this too. But can't you just install with the seat belt then?

@looch: Most seats do not allow for them to be used together because it makes the seat too rigid, and the seat is designed to flex and move just a bit in a crash. ETA: seats that specifically say that you can use both are OK to use both.

You can use JUST the seat belt, without LATCH once you've surpassed the weight limit though.

@looch: just to clarify, when you say, 'uses both LATCH and the seat belt in order to provide the maximum weight usage on the seat', do you mean at the same time or that is has the ability do be installed with a seat belt or with latch?

most convertible seats with higher weight limits have the option to use LATCH or seatbelt to install, but then are installed with the seatbelt once they reach the LATCH limit (check your car manuel, depending on the year it could have a different limit, my old volvo had LATCH before it was required, but it had a lower limit than the mandatory LATCH that came out right after). some newer boosters use latch to secure the booster to the car, but then use the seatbelt to restrain the child. you should be able to use your seat until LO reaches the height limit (will probably outgrow it before 70lbs though), you'll just install it with the seatbelt instead of LATCH. LATCH isn't any safer or better, it is there to make it easier, but the seat will be as safe when installed correctly using the seatbelt.

@looch: That's correct, you have to reinstall with the belt when you exceed the latch weight limit for your vehicle (which may be less than the new max limits). Once you reach them I personally would move to just the seatbelt as there's no way to ensure the weight distribution between the belt & latch wouldn't exceed the latch limits. Idk much about the new seat design but I'd definitely talk to a tech (or a couple since not all techs are as up to date or informed as others) before installing it that way.

This is a great thread, I have to get up to speed on these updates, was not aware!