Firestone | 525-21
Firestone | 525-21 Firestone | 525-21 Firestone | 525-21
Tire Series Firestone Classic
Brand Firestone
SKU 789680
Product Size 525-21
Tire Construction Bias Ply
Sidewall Style Blackwall
Bias Ply Width 5.25
Rim Diameter (in/mm) 21 inch
Overall Diameter (in) 31.50
Section Width (in) 5.12
Tread Width (in) 4.25
Rim Width (in) 2.50 - 3.00
Max Load Capacity 1120@36 psi
Tread Depth (32nds) 12
Construction Ply 6 PLY POLY
Tube Type or Tubeless Tube Type

Firestone | 525-21

Per Tire



Firestone | 525-21

This Firestone 525-21 bias ply tire is perfect for many late '20s American automobiles. It is the original size for 1926 through 1928 Buick, and many Dodge, Essex, Franklin, Oldsmobile, Paige and more! Firestone Wide Whitewall tires are exceptional fitments for vintage car restoration projects. These tires are expertly hand-crafted in the USA, using refurbished original molds. They feature authentic tread designs and sidewall markings. Firestone Bias Ply tires are a premium tire choice for fine antique automobiles.

Bias Ply Construction

Bias ply tire construction is a method that was used from the 1900's through the 1970's on passenger cars and light trucks. Bias ply tires feature ply cords that run at a 45 degree angle to the bead, and overlap in a crisscross pattern, depending on how many ply layers are used. This creates a strong tire, but bias ply tires have a tendency to follow breaks or ruts in the pavement. Bias ply tires are the most authentic choice for classic car restorations and traditional hot rod builds. Coker Tire offers a huge variety of bias ply tires for many applications. 

Firestone Tires for Collector Vehicles

Coker Tire is proud to offer authentic Firestone tires for a wide range of cars, trucks and motorcycles built from the 1900's through the 1970's. We offer Firestone Non Skid tires, Firestone Deluxe Champion tires, Firestone Wide Oval tires and many more famous styles and sizes to fit military vehicles, motorcycles and classic commercial trucks. With whitewalls, redlines, raised white letters and other classic sidewall styles, this product line is one of our most extensive and popular brands.

Please Note

  • Tire mounted on wheel for demonstration purposes only. Wheel and other accessories are not included. Please note that dimensions listed (tread width, section width and overall diameter) are non-scientific and based on an inflated tire, mounted to a wheel. Dimensions may vary due to rim width and inflation pressure. Please note Chemical Guys Tire and Rubber Cleaner and Adams Polish Tire shine has been linked to Whitewall browning and should not be used. We recommend using our line of tire care products.

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