M+S or Winter tires required in western U.S.?
I did a search of DOT websites. It appears M+S or winter (mountain-snowflake marked) tires are not required in WA, ID, MT, UT, CA, NV, AZ unless conditions warrant authorities to require them i.e....
Forum Discussion
In CA we have R1 and R2 controls in the winter
R1 4wd with M+S (no chains required) and chains required on 2wd vehicles
R2 Chains required on all vehicles
90% of the time its only R1 in the mountains
so yes if you just carry chains you are good to go. My 19.5s are not M+S so I carry chains
R1 4wd with M+S (no chains required) and chains required on 2wd vehicles
R2 Chains required on all vehicles
90% of the time its only R1 in the mountains
so yes if you just carry chains you are good to go. My 19.5s are not M+S so I carry chains
