Understanding Tire Size
Width (mm)
Tire width in millimeters
Profile (%)
Height as percentage of width
Construction
R = Radial tire construction
Diameter (inches)
Rim diameter in inches
Load Index
Maximum load capacity (see table)
Speed Index
Maximum speed rating (see table)
Tire Symbols & Markings
Common markings found on tire sidewalls and their meanings
Maximum allowable tire pressure
Maximum permissible load
Reinforced tire with extra load capacity
Tire requires inner tube
Tubeless tire - no inner tube required
Tread can be deepened (regrooved)
Radial tire construction
Winter tires or all-season tires suitable for mud and snow
Tires designed for year-round use in all conditions
Arrow indicates direction of tire rotation
Asymmetrical tires - must be mounted according to marking
Directional tires for left or right side only
Tires optimized for wet conditions
Tire meets European ECE requirements (E in circle)
DOT code indicates manufacturing date
Heat resistance rating at high speeds (A = best)
Wet braking performance rating (A = best)
Wear resistance factor (100 = approx. 48,000 km)
All Grip Traction - suitable for all weather
Black Side Wall - standard black sidewall
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