Generally, most Evenflo car seats allow approximately 20% of the bottom of the car seat to hang over the front of the vehicle seat. The majority of the bottom of the car seat (80%) should be supported by the vehicle seat. This applies whether the car seat is installed rear-facing, forward-facing or in booster mode, and whether installed with the vehicle seat belt system or the lower anchor system. There are exceptions to this general rule. When installed in rear-facing mode, the following car seats require the entire bottom of the car seat to be supported by the vehicle seat, as noted in the image below. - Evenflo SureRide/Titan 65 - Evenflo Stratos - Evenflo Sonus 65 - Evenflo Sonus - Evenflo Titan 50 (discontinued) - Evenflo Tribute In some minivans with optional second row center seats, you may find that the car seat bottom actually overhangs the side of the vehicle seat. In this situation, the same general guidance provided above applies—at least 80% of the bottom of the seat must be supported by the vehicle, with the exception of the car seats listed above in rear-facing mode, where the entire bottom of the seat must be supported.