The FS821 is a dependable, durable and long wear all-position tire that delivers 15% longer mileage and 9% better wet traction than the previous generation FS820. The new FS821 has an aggressive pattern design with optimized grooves to combat the retention of casing-damaging stones. Optimized groove design combats stone retention for long mileage and retreadability Stone rejector platforms prevent stones from becoming trapped in the tread to protect the casing from potential damage Improved footprint area maintains better contact area throughout the life of the tread for smooth, even wear 50% more biting edges than previous generation FS820, allowing for improved wet and snow traction Three Peak Mountain Snowflake certified Special tread compound and all-steel casing and cap/base compounding resists cuts and improves durability and retreadability Extra-deep, wide tread with more biting edges provides excellent traction and increased tread life Specifications Tire Size 11R22.5 Vehicle Type Light Truck Tire Width 11 in Wheel Diameter 22.5 Inches Warranty Distance 0 miles Tire Season All-Season Tire Speed Rating K Tire Type Commercial Tires Tire Load Index 146 Tread Depth 24/32 Brand Firestone Assembled Product Weight 127 lb Model FS821 003159 Manufacturer Part Number 3159 Manufacturer Firestone 
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