Join Date: Dec 2006
Location: British Columbia
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Because the air protect is either 1) not tested with a rfing tether or 2) tested and failed. I'm guessing most likely #1. But there is no way for the consumer to know how it would work in a crash if tethered, and you'd have to make your child a crash test dummy to find out!
The only seats that allow rfing tethering are the Britax seats and the Radian.
There are no standards for testing rfing tethers. There may be a small safety difference, but it's not proven and it's not significant.
|As larger and heavier infants are carried rear-facing, the chance of an infant's head hitting a hard part of the vehicle is greater. Tethering a rear-facing convertible CR to the floor can reduce the risk of head and facial injuries in rear and side crashes by reducing head excursion.|
CPST & mom