For proper maintenance, safety, and maximum fuel economy, you must always maintain recommended tire inflation pressures and stay within the load limits and weight distribution recommended for your vehicle.

All specifications (sizes and pressures) can be found on a label attached to the driver's side center pillar.
Tires and Wheels
Recommended Cold Tire Inflation PressuresHyundai Elantra AD (2016-2020) Owners Manual: Driving in Flooded Areas, Highway Driving
Driving in Flooded Areas
Avoid driving through flooded areas unless you are sure the water is no higher
than the bottom of the wheel hub. Drive through any water slowly. Allow adequate
stopping distance because brake performance may be reduced.
After driving through water, dry the brakes by ge ...
Hyundai Elantra AD (2016-2020) Owners Manual: Do Not Install a Child Restraint in the Front Passenger's Seat
Even though your vehicle is equipped with the OCS, never install a child restraint
in the front passenger's seat. An inflating air bag can forcefully strike a child
or child restraint resulting in serious or fatal injury.
WARNING
NEVER place a rear-facing or front-facing child restrai ...