How long can my child stay rear-facing in these seats?

Rear-facing capacity varies. The Graco Extend2Fit line is repeatedly singled out by csftl.org and specialist subreddits for its 50-lb rear-facing weight limit and leg-extension panel, which is higher than the 35-40 lb limit on many competitors. Extended rear-facing is widely recommended by car-seat safety advocates, so a higher rear-facing limit is a meaningful differentiator.