I wanted to ERF until she was at least 2 to be safe... I wish they had a carseat that had a higher weight limit!
For everyone that keeps saying there is something wrong with her she was born 11lbs, her dad is 6'5 and I am close to 5'10. She is just solid. If you saw her, you wouldn't think she weighs that much, but she is super tall! She wears mostly 2T, but some 3T as well.
Not every child that weighs a lot is obese or whatever, she is very healthy and her drs are impressed with her :)