2012 Toyota 4Runner Owners Manual - Page 591

2-5. Driving information Selection tire chains Use the correct tire chain size when mounting the tire chains. Chain size is regulated for each tire size. Side chain (0.20 in. [5 mm] in diameter) Cross chain (0.20 in. [5 mm] in diameter) CTH25AS009 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.