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FS821

Severe Service

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Firestone FS821

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.

Specialized Features

TREAD
CASING

Optimized Groove Design: Improved groove angles to prevent stone retention and maintain casing retreadability
Stone Rejector Platforms: Design feature that prevents stones from becoming trapped in the tread to protect the casing from potential damage
Improved Footprint Area: New design that maintains better contact area throughout the life of the tread for smooth even wear
Multiple Gripping Edges: 50% more biting edges than previous generation FS820, allowing for improved wet and snow traction

SPECIAL TREAD COMPOUNDS: Help resist cuts, chips and tears for long original tread life
RUGGED FOUR-RIB DESIGN WITH OPTIMIZED GROOVES: Combats stone retention for long mileage and retreadablity
EXTRA-DEEP, WIDE TREAD WITH MORE BITING EDGES: Provides excellent traction, increased tread life
ALL STEEL CASING AND CAP/BASE COMPOUNDING: Resists cuts and improves durability and retreadability
STONE REJECTOR PLATFORMS: Help prevent the retention of casing-damaging stones for enhanced retreadability

Specifications

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Standard

Metric

Details

Application: Severe Service
Article Number: 3159
Tire Size: 11R22.5
Compound
Ply/Star Rating: 16
Tread Depth (32nds) (mm): 24 19
Load Range: H
Overall Width (in) (mm): 11 279
Overall Diameter (in) (mm): 42 1067
Max. Tire Load Dual (lbs) (kg): 6005 2725
Max. Speed (mph) (km/h): 68 109
Meas. Rim (in) (mm): 8.25 210
Overall Width Loaded (in) (mm): 12.1 307
Static Loaded Radius (in) (mm): 19.5 495
Max. Tire Load Single (lbs) (kg): 6610 3000
Inflation Pressure (psi) (kPa): 120 830
Revolutions Per (mile) (km): 495 308

Application: Severe Service
Article Number: 3164
Tire Size: 315/80R22.5
Compound
Ply/Star Rating: 20
Tread Depth (32nds) (mm): 26 21
Load Range: L
Overall Width (in) (mm): 12.7 323
Overall Diameter (in) (mm): 42.9 1090
Max. Tire Load Dual (lbs) (kg): 8270 3750
Max. Speed (mph) (km/h): 68 109
Meas. Rim (in) (mm): 8.25 210
Overall Width Loaded (in) (mm): 13.9 353
Static Loaded Radius (in) (mm): 19.9 505
Max. Tire Load Single (lbs) (kg): 9090 4125
Inflation Pressure (psi) (kPa): 130 900
Revolutions Per (mile) (km): 484 301

Application: Severe Service
Article Number: 3161
Tire Size: 11R24.5
Compound
Ply/Star Rating: 16
Tread Depth (32nds) (mm): 24 19
Load Range: H
Overall Width (in) (mm): 10.9 277
Overall Diameter (in) (mm): 44 1118
Max. Tire Load Dual (lbs) (kg): 6610 3000
Max. Speed (mph) (km/h): 68 109
Meas. Rim (in) (mm): 8.25 210
Overall Width Loaded (in) (mm): 12 305
Static Loaded Radius (in) (mm): 20.5 521
Max. Tire Load Single (lbs) (kg): 7160 3250
Inflation Pressure (psi) (kPa): 120 830
Revolutions Per (mile) (km): 472 293

Product Sheet