Question Radian Safe Stop

kidnurse

Active member
I absolutely love the concept of the safe stop, however since I am planning on RF to 45 lbs we obviously won't be using it. Why can't one be made that goes to 65 lbs? Or is it that it could be made but no one has made it yet?
 
ADS

monstah

New member
It used to go to 48 pounds but they changed that. My guess is that once a kid passes 40 pounds, their weight is enough to stretch the harness & seatbelt for ample ride down in a collision so it becomes unnecessary.
 

Maedze

New member
Because if you use the SafeStop over 40 pounds, you increase head excursion beyond acceptable standards, increasing the risk of head and therefore spinal injury.
 

joolsplus3

Admin - CPS Technician
Oops, hit thanks, but since it a good question, I guess that's ok!

I'm pretty sure the theory behind it is that the seat has SUCH low head excursion numbers with the lighter dummy, that they want to increase the numbers and thus increase the ride down time, and thus reduce the risk of injury. A heavier kid is going to stretch out all the belts and harness much more on their own, they don't need an extra piece to rip out to give them more ride down time and more head excursion (as you get a heavier dummy, you have to keep them from flying forward too far!)

Britax has tethers that rip out, and they are used at all weights, I'm not sure if it's something different about how it's the tether attached to the car versus the harness that's attached to the child? But somehow they are engineered differently with the same basic result: preventing the body from coming to a jerking stop too quickly which increases injury risk (like putting your hand in front of a brick wall to stop an egg someone's thrown, the hand is like the safestop/ripstitch, it keeps the egg from stopping too fast and breaking).
 

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