GR70-15 Steelgard RWL Tire
The Goodyear Steelgard Raised White Letter Tire is sized at GR70-15, which is perfect for 1973 through 1978 Corvettes, as well as Chevrolet Monte Carlo and many full size GM cars from the 1970s. The RWL sidewall markings and tread pattern are accurate, and the radial construction offers a smooth ride.
Genuine Raised White Letter Tire
This is a raised white letter tire, sometimes called RWL for short. Raised white letter tires became common in the late sixties on muscle cars like the Pontiac GTO and high performance pony cars, like the Ford Mustang. Raised white letter tires feature white rubber that is built into the tire's sidewall when the carcass is being assembled. The letters are formed when the tire is vulcanized in a curing mold, and then buffed clean to reveal bright white letters. Look for this classic style from our featured brands like Pro-Trac, Firestone Wide Oval and BFGoodrich Radial T/A tires.
Bias Look Radial Tire
The term "bias look radial" is something that Coker Tire created when we introduced the American Classic bias look radial product line. This means the tire has the appearance and the sizing profiles of a vintage bias ply tire, with modern radial construction. This provides an original look with a smooth ride and longer tread life, compared to bias ply tires. We offer bias look radial tires for vehicles ranging from the 1920's through the 1970's.
Goodyear Steelgard
Engineered with advanced Steelgard technology, this tire offers enhanced resistance against wear and tear, ensuring longevity and consistent performance over its lifespan.
Classic Goodyear Tires
Goodyear is one of the most famous brands in the tire world, and our line of Goodyear classic tires, includes famous muscle car tires like the Goodyear Polyglas and many more from the 1960's and 1970's. Also included in the Goodyear product line is a series of whitewall tires, and various raised white letter and yellow letter tires from the '80s and beyond. The Goodyear Collector Series OF tires has over 80 designs spanning the 1920s to early 2000’s.
Please Note
- These Classic Goodyear tires are drop shipped directly. Please allow additional shipping time. These items will be drop shipped when the order is processed. 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.
| SKU | 725282 |
|---|---|
| Weight | 30.000000 |
| Brand | Goodyear |
| Construction Ply | STEELGARD |
| Product Size | GR70-15 |
| Tube Type or Tubeless | Tubeless |
| Tire Series | Steelgard |
| Rim Diameter | 15 inch |
| Tire Construction | Bias Look Radial |
| Sidewall Style | RWL |
| Width Bias Look Radial | G |
| Circumference | 87 |
| Section Width (IN) | 9.38 |
| Revolutions per mile | 728 |
| Rim Width (in) | 8 |
| Overall Diameter (IN) | 27.45 |
| Availability Date | 2027-06-06T00:00:00Z |
This Goodyear Steelgard RWL comes in the GR70-15 size, suitable for the classic and collector vehicles listed below.
About the GR70-15 Tire Size
GR70-15 is a radial tire size associated with a wide range of vehicle applications from 1966 through 1982, including performance, luxury, and grand touring models from makes such as Maserati, Aston Martin, Chevrolet, Pontiac, Buick, and others. On this product page, the Goodyear Steelgard RWL is offered in that GR70-15 size, making it relevant to vehicles associated with this fitment range and its raised white letter appearance. For more detailed information on this tire size, explore the GR70-15 tire on Coker Tire Fitment Guide.
Vehicle Fitment for the Goodyear Steelgard RWL | GR70-15
The Goodyear Steelgard RWL | GR70-15 is available in a tire size associated with a range of classic and collector vehicles. The vehicle applications below are organized by year, make, and model to help identify vehicles associated with the GR70-15 size. Explore the linked Make & Model and Year Make & Model pages for more detailed fitment information.
Fitment information should be verified for the specific vehicle before purchase. Confirm tire size, wheel fit, load requirements, overall diameter, and available clearance.
1966–19701 make · 5 fitments
The 1966–1970 period includes Maserati applications associated with the GR70-15 tire size. This range is centered on the Ghibli across five model years.
Maserati
Maserati applications in this period include the Ghibli.
1971–19756 makes · 25 fitments
The 1971–1975 period includes a broader mix of GR70-15 applications spanning Aston Martin, Maserati, Chevrolet, Pontiac, Buick, and GMC. This range covers both imported grand touring cars and domestic performance and personal luxury models.
Aston Martin
Aston Martin applications in this period include the DBS and AM.
Maserati
Maserati applications in this period include the Ghibli.
Chevrolet
Chevrolet applications in this period include the Corvette, Monte Carlo, Chevelle, and El Camino.
Pontiac
Pontiac applications in this period include the Firebird, Grand Am, Grand Prix, and LeMans.
Buick
Buick applications in this period include the Century and Regal.
GMC
GMC applications in this period include the Sprint.
1976–19808 makes · 31 fitments
The 1976–1980 period includes the broadest spread of GR70-15 applications, covering Aston Martin, Buick, Chevrolet, GMC, Oldsmobile, Pontiac, Ford, and Mercury. Applications in this range span sporty coupes, personal luxury cars, and full-size models.
Aston Martin
Aston Martin applications in this period include the AM.
Buick
Buick applications in this period include the Century, Regal, LeSabre, and Riviera.
Chevrolet
Chevrolet applications in this period include the Corvette, El Camino, Monte Carlo, and Camaro.
GMC
GMC applications in this period include the Sprint.
Oldsmobile
Oldsmobile applications in this period include the Cutlass and Toronado.
Pontiac
Pontiac applications in this period include the Firebird and Grand Prix.
Ford
Ford applications in this period include the LTD.
Mercury
Mercury applications in this period include the Marquis.
1981–19821 make · 2 fitments
The 1981–1982 period includes Buick applications associated with the GR70-15 tire size. This short range is focused on the Riviera.
Buick
Buick applications in this period include the Riviera.
Frequently Asked Questions
Fitment & Compatibility â–¼
The Goodyear Steelgard RWL GR70-15 is specifically sized to match factory fitment for 1973 through 1978 Chevrolet Corvette models equipped with 15-inch wheels. The 27.45-inch overall diameter and G-width profile closely align with original GR70-15 specifications used during that era. An 8-inch recommended rim width also matches typical Corvette wheel dimensions.
Fitment remains correct for stock suspension and factory ride height setups. Clearance is generally sufficient for both front and rear, but vehicles with aftermarket suspension components or altered ride height should verify clearance under compression and full steering lock to avoid interference.
The Goodyear Steelgard RWL GR70-15 is listed as a correct fitment for 1970 through 1972 Chevrolet Monte Carlo models, making it a direct replacement for original GR70-15 tires. The section width of 9.38 inches and 27.45-inch diameter maintain factory stance and wheel well proportions.
Compatibility assumes stock 15-inch wheels with approximately 8-inch width. Vehicles with upgraded brakes or aftermarket wheels may require additional clearance checks. Proper alignment and suspension condition are also important to ensure even wear and stable handling characteristics.
The Goodyear Steelgard RWL GR70-15 maintains a 27.45-inch overall diameter, closely matching original tire dimensions for many 1970s vehicles. Ride height and stance remain consistent with factory specifications when replacing original GR70-15 tires.
Minor variations in inflation pressure or rim width can slightly alter overall height. Maintaining proper tire pressure ensures consistent ride height and prevents uneven stance changes across the vehicle.
Tire Size Equivalents & Conversions â–¼
The Goodyear Steelgard RWL GR70-15 corresponds closely to modern radial sizes such as 225/70R15 and 215/75R15. These equivalents provide similar overall diameter and load characteristics while maintaining compatibility with 15-inch wheels.
Differences in section width and aspect ratio may slightly affect ride height and stance. The GR70-15 maintains a period-correct profile, while modern metric sizes may appear slightly narrower or taller depending on the chosen equivalent.
The Goodyear Steelgard RWL GR70-15 maintains a diameter close to its metric equivalents, resulting in minimal speedometer deviation. Differences are typically within a few percentage points.
Switching to significantly different sizes can cause noticeable inaccuracies. Maintaining a diameter near 27.45 inches ensures consistent speedometer readings and drivetrain performance.
Performance & Use Case â–¼
The Goodyear Steelgard RWL GR70-15 uses bias look radial construction, providing smoother highway performance compared to traditional bias ply tires. The radial design improves stability, reduces vibration, and enhances tread life during extended driving.
At highway speeds, the tire maintains consistent tracking and reduced heat buildup compared to bias ply designs. Proper inflation is important to maintain stability and minimize uneven wear during long-distance use.
The Goodyear Steelgard RWL GR70-15 offers improved handling due to radial construction, which provides better road contact and flexibility. Cornering stability and braking performance are more predictable than bias ply alternatives.
Bias look radial design retains vintage aesthetics while improving driving confidence. Steering response is more controlled, especially during highway cruising and moderate cornering.
The Goodyear Steelgard RWL GR70-15 is suitable for regular street use and occasional daily driving. Radial construction improves durability and tread life compared to traditional bias ply options.
Consistent performance requires proper maintenance and alignment. While not a modern performance tire, it provides a balanced combination of vintage style and usable road manners.
Construction, Durability & Load Capacity â–¼
The Goodyear Steelgard RWL GR70-15 combines vintage bias ply appearance with modern radial construction. The design maintains period-correct sidewall shape while improving ride quality and durability.
Radial construction enhances tread life and reduces heat buildup. The tire provides a balance between authenticity and modern usability, making it suitable for classic vehicle owners.
The Goodyear Steelgard RWL GR70-15 incorporates Steelgard technology, which enhances resistance to wear and tear. Radial construction further improves longevity compared to bias ply tires.
Durability depends on proper inflation, alignment, and driving conditions. Regular inspection ensures consistent performance and extended service life.
Installation & Maintenance â–¼
The Goodyear Steelgard RWL GR70-15 is a tubeless tire, meaning it does not require an inner tube when mounted on compatible wheels. Proper sealing between the tire and rim ensures air retention.
Wheels must be in good condition to support tubeless installation. Damaged or corroded rims may require repair to maintain proper sealing.
The Goodyear Steelgard RWL GR70-15 should be stored in a cool, dry environment away from direct sunlight. Proper storage prevents rubber degradation.
Keeping tires clean and properly positioned helps maintain condition. Avoid exposure to extreme temperatures for best longevity.




