Special Markings on Tires
2021-08-02
MARKING DESCRIPTION NOTE
TRA The Tire and Rim Association  
DOT US Department of Transportation  
TL TUBELESS TYPE  
TT TUBE TYPE  
STEEL STEEL CONSTRUCTION  
NYLON NYLON CONSTRUCTION  
POLYESTER POLYESTER CONSTRUCTION  
TREADWEAR TREADWEAR GRADES A government-required number that indicates a tire's expected wear. A grade of 300 denotes a tire that will wear three times as well as a tire graded 100. But the numbers are assigned by tire manufacturers, not an independent third party.
TEMPERATURE TEMPERATURE RESISTANCE A/B/C, from high to low
TRACTION TREAD GRADES AA/A/B/C, from high to low
△T.W.I TREAD WEAR INDICATOR The minimum legal tread depth is  2/32 of an inch (1.6 mm) across the width of the tread.
M+S MUD+SNOW-TERRAIN TIRE  
MO MERCEDES ORIGINAL TIRE  
OE THE ORIGINAL (EQUIPMENT) TIRE FROM CAR MANUFACTURER ASSEMBLIES TO BE USED SPECIFICALLY WITH ITS BRANDED VEHICLES  
XL THE XL STANDS FOR EXTRA LOAD AND MEANS THE SIDEWALLS OF THE TIRE ARE STRONGER AND CAPABLE OF HANDLING HEAVY LOAD REQUIREMENTS.  

NOTE: TREADWEAR + TRACTION + TEMPERATURE

NOTE: MUD + SNOW