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) Service Manual: Smart Cruise Control Unit Repair procedures
Removal
1.
Remove the bumper.
(Refer to Body - "Front Bumper")
2.
Disconnect the smart cruise control unit connector (A).
3.
Remove the smart cruise control unit assembly (B) from vehicle after loosening mounting bolts.
Installation
1.
Install in the reverse order of removal. ...
Hyundai Elantra AD (2016-2020) Owners Manual: Components of the Tire Mobility Kit
1. Speed-restriction label
2. Sealant bottle and label with speed restriction
3. Filling hose from sealant bottle to wheel
4. Connectors and cable for the power outlet direct connection
5. Holder for the sealant bottle
6. Compressor
7. ON/OFF switch
8. Pressure gauge for displaying the tire ...