Tire Service Type Ratings

Most tire sizes begin with one or more letters :

P = P-Metric (Example: P215/65R17 98T)

• used on passenger vehicles.

Metric / Euro-Metric (Example: 185/65R15 88T)

• usually found on European cars.

LT - Light Truck (prefix) (Example: LT235/75R15 104/101S/C)

• used on SUVs, full-size vans, and medium-duty and heavy-duty pickup trucks with ¾ ton to 1-ton capacity.

LT - Light Truck (suffix) (Example: 9.5-16.5 LT/117R)

• used on light-duty, medium-duty, and heavy-duty pickup trucks (typically ½ ton, ¾ ton or 1-ton load capacity), sport utility vehicles, and vans.

T = Temporary Spare (Example: T/70R17 106M)

• as mini spares or space savers, temporary spares are designed for short-term use until the regular tire is repaired or replaced.

ST - Special Trailer (Example: ST175/80R13)

• special trailer tires and should only be used on car, boat, or utility trailers.

C = Commercial (Example: 31x10.50R15/ C109R)

• used on delivery trucks and vans capable of carrying heavy loads.