Lexus CT200h Owner's Manual page 313

Selecting tire chains
Use the correct tire chain size when mounting the tire chains.
Chain size is regulated for each tire size.
Regulations on the use of tire chains
Regulations regarding the use of tire chains vary depending on
location and type of road. Always check local regulations before
installing chains.

Tire chain installation
Observe the following precautions when installing and removing chains:

Install and remove tire chains in a safe location.

Install tire chains on the front tires only. Do not install tire chains on the
rear tires.

Install tire chains on front tires as tightly as possible. Retighten chains
after driving 0.5 - 1.0 km (1/4 - 1/2 mile).

Install tire chains following the instructions provided with the tire
chains.
CT200h_OM_OM76067E_(EE)
2-5. Driving information
Side chain:
3 mm (0.12 in.) in diameter
Cross chain:
4 mm (0.16 in) in diameter
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