Replacement Tire Specifications

Manufacturer	Firestone	Firestone	Goodyear	Goodyear
Tire Size	380/105R50	IF380/105R50	480/80R50	620/70R46
Recommended Inflation	440 kPa (64 psi)	380-460 kPa (55-67 psi)	380-500 kPa (55-73 psi)	260-380 kPa (38-55 psi)
Load Index Rating	168B	177	176A8/B	176A8/B
Load Index (lbs)	12,300	16,100	15,700	15,700
Speed Symbol (mph)	30	30	30	30
Tire Section Width (in.)	15.0	16.0	18.9	24.4
Tread Depth	R-1	R-1	R-1W	R-1W

Tire Size example: 380/105R50 168B R-1W

• ”380” - Tire Section Width in Millimeters
• ”105” - Aspect Ratio of Tire - Equal to Tire Section Height / Tire Section Width
• ”R” - Radial Construction
• ”50” - Nominal Rim Diameter in inches
• ”168” - Load Index Rating - Carrying Capacity Code
• ”B” - Speed Symbol - Determines max speed allowed at rated load
• “R-1W” - Traction Tread Depth Code

IMPORTANT: Replacement tires must be of same size and must have equivalent load index rating as shown in chart.