Por exemplo Cybex Pallas 2 Fix tem almofada abdominal.
A cadeira invertida ainda não vi nenhum teste de colisão traseira, a mim fazia uma espécie enorme certamente que o meu aos 9 meses ficava com as pernas esmagadas numa batida traseira.
Numa colisão traseira ambos os carros estão teoricamente a circular no mesmo sentido. As forças exercidas nos diferentes tipos de colisão são bastante diferentes, mesmo se um dos carros estiver a fazer marcha-atrás. Além disso, entre pernas partidas ou paralisia de braços e pernas acho que a escolha é óbvia.
Retirado de
http://www.rearfacing.co.uk/faqs.php
"What about rear ended crashes? Is a rear facing seat in a rear ended crash not equivalent to a forward facing seat in a frontal crash?
No, this is not the case and there are a number of reasons why.
Statistically, frontal crashes tend to happen at higher speeds and involve severe personal injury. They are very serious crashes. Rear ended crashes tend to happen at lower speeds and mainly involve material damage. So from a statistical point of view, it is more important to have the best protection for frontal crashes.
Also, in rear ended and side impact crashes, the driver tend to step on the break just before impact, which creates a brake force with a forward direction. A rear facing child will be pushed into the seat and cradled as in a frontal collision, while a forward facing child will be thrust forward, losing contact with the back of the seat and subsequently making the side impact protection less efficient.
Considering the forces involved, two cars travelling at 70mph colliding in a frontal crash create enormous forces as the car goes from high speed to a complete standstill in seconds. Two cars travelling in the same direction, with one hitting the other from behind, only create a very small differentiating force, making the impact much less serious.
The equivalent is not a typical rear ended impact, but rather someone reversing into a stationary object, which is very unlikely to happen at 70mph!"
Ver também
http://www.carseat.se/rear-facing-car-seats-and-leg-space-for-your-child/