Goodyear Speedway 350 RWL Large Letter | E70-15

The Goodyear Speedway 350 E70-15 requires a 15-inch wheel that is 7 inches wide. Its 8.4-inch section width and 26.73-inch overall diameter should be compared with the vehicle’s current tire, wheel offset, suspension clearance, and fender space before purchase.

The supplied fitment chart identifies the 1969 Chevrolet Camaro with the Z28 option and 1968 to 1969 Ford Shelby Mustang GT applications. Modified brakes, lowered suspension, nonfactory wheels, or altered axle width can still affect fitment. Vehicle listing alone does not replace direct measurement.

The Goodyear Speedway 350 E70-15 is specified for a 7-inch-wide wheel with a 15-inch rim diameter. Using the intended rim width helps preserve the designed sidewall profile, tread shape, bead seating, and overall stance. Wheel backspacing and offset must still be verified separately.

A narrower wheel can increase sidewall bulge and alter tread contact, while a wider wheel can flatten or stretch the casing beyond its intended shape. Correct diameter and width do not guarantee suspension, brake, steering, or fender clearance on a specific vehicle.

The Goodyear Speedway 350 E70-15 has a listed overall diameter of 26.73 inches. That dimension affects ride height, wheel-well fill, fender clearance, effective gearing, and the visual stance of a restored muscle car. It also influences available space above the tread.

Compare the tire’s radius with the current tire and check clearance under suspension compression, body roll, and steering movement. A tire that clears while parked may contact the fender lip, sway bar, or inner wheelhouse during driving. Diameter changes can also affect speedometer accuracy and highway engine rpm.

Before buying the Goodyear Speedway 350 E70-15, verify a 15-inch wheel with a 7-inch rim width. Compare the tire’s 26.73-inch overall diameter and 8.4-inch section width with the existing setup, including wheel backspacing and vehicle stance.

Measure fender, suspension, steering, brake, and inner-wheelhouse clearance at normal ride height and during expected suspension travel. Also confirm the vehicle’s required load capacity and restoration goals. The supplied fitment chart is useful, but direct measurement remains essential when the vehicle has nonfactory wheels, brakes, suspension, or ride height.

E70-15 is an older alphanumeric tire size used during the muscle-car era. The E identifies the approximate width class, 70 indicates the profile series, and 15 identifies the required wheel diameter in inches. The code does not show every physical dimension.

For practical fitment, use the published measurements rather than relying only on the size code. The Goodyear Speedway 350 E70-15 measures 26.73 inches in overall diameter, 8.4 inches in section width, and is specified for a 7-inch rim. These figures provide a clearer basis for comparing clearance and stance.

The supplied conversion chart lists 205/70R15 as a similar radial alternative to the Goodyear Speedway 350 E70-15. Similar does not mean identical because actual diameter, section width, tread shape, load capacity, and approved rim width vary by manufacturer.

A 205/70R15 radial will also behave differently from the four-ply polyester bias-ply Speedway 350. Expect differences in steering response, road tracking, sidewall flex, and ride feel. Compare published dimensions and service ratings directly before substituting the radial size for the original E70-15 specification.

The 70-series profile of the Goodyear Speedway 350 E70-15 contributes to its tall sidewall, period-correct stance, and traditional ride character. Combined with bias-ply construction, the sidewall flexes differently from a modern low-profile radial. This flexibility influences both comfort and steering response.

The taller profile can provide useful compliance over rough pavement, but it may also allow more tread movement during cornering. Inflation pressure is important because underinflation increases flex and heat, while excessive pressure can reduce compliance and alter the contact patch. Use the published specifications and vehicle requirements when setting pressure.

The Goodyear Speedway 350 E70-15 is a bias-ply tire with four-ply polyester construction and a period-correct tread pattern. On the highway, it will generally feel more traditional and less isolated than a modern radial tire.

Bias-ply tires can follow pavement grooves, seams, and road crown more noticeably. Proper alignment, balancing, inflation, and steering-component condition are essential for stable tracking. Because no speed rating is supplied, sustained high-speed use should remain within manufacturer guidance and the limits of the vehicle, load, and complete wheel-and-tire assembly.

The Goodyear Speedway 350 E70-15 is intended for classic street machines and show-quality restorations seeking authentic muscle-era appearance and road feel. Its 1,400-pound load capacity at 32 psi must suit the vehicle’s axle requirements. The specified 7-inch wheel must also fit correctly.

For regular street use, verify alignment, balance, pressure, and clearance. Drivers should accept the tracking and steering characteristics of bias-ply construction. The supplied information does not include a speed rating, so highway expectations should be confirmed before sustained high-speed travel. Restoration authenticity does not remove the need for modern maintenance discipline.

The Goodyear Speedway 350 E70-15 is strongly suited to restorations where correct large Raised White Letters, authentic sidewall markings, and the original Speedway 350 tread pattern matter. It is specifically associated with all 1968 Shelbys and early 1967 Shelby applications.

Exact correctness still depends on production timing, model, documentation, and judging standards. The product information notes that two letter designs were produced during the period, so not every Shelby used the same version. Confirm the vehicle’s build details before selecting the large-letter tire solely from model-year assumptions.

The Goodyear Speedway 350 E70-15 uses bias-ply construction with four-ply polyester reinforcement. Its cords run diagonally across the tire and overlap in a crisscross pattern, creating the traditional casing behavior used on passenger cars during the period.

This construction supports authentic appearance and road feel, but it behaves differently from a radial. The tire may track pavement irregularities more strongly and allow more linked tread and sidewall movement. Buyers should choose it for period-correct character while understanding the handling, inflation, and maintenance differences associated with bias-ply tires.

The Goodyear Speedway 350 E70-15 reproduces the bold large Raised White Letters, authentic sidewall markings, and original Speedway 350 tread pattern associated with late-1960s performance cars. The white lettering is built into the sidewall and revealed during finishing rather than applied as surface paint.

The large-letter design is specifically described as correct for early 1967 Shelby Mustangs and all 1968 Shelbys. Since another letter design also existed, exact authenticity depends on build date and application. Restoration documentation should guide the final choice when judging standards are strict.

Four-ply polyester describes the casing reinforcement used in the Goodyear Speedway 350 E70-15. Polyester cords form the structural layers that support the tire’s shape, load, and traditional bias-ply behavior. The construction also contributes to its period-correct road feel.

The ply description does not replace the published load limit. The tire is rated for 1,400 pounds at 32 psi, and vehicle axle loads must remain within that capacity. Wheel rating, speed guidance, tire age, and road conditions also matter. Four-ply construction should not be interpreted as unlimited durability or competition approval.

The Goodyear Speedway 350 E70-15 should be installed on a 15-inch wheel that is 7 inches wide, as specified on the product page. The wheel should be inspected for rust, bends, cracks, damaged bead seats, and incompatible valve hardware before mounting.

Professional tire equipment and suitable mounting lubricant should be used to protect the bead and sidewall lettering. Confirm that both beads seat evenly and that the tire rotates without visible runout. Final fitment checks should include suspension, brake, steering, and fender clearance before road use.

Clean the Raised White Letters on the Goodyear Speedway 350 E70-15 with mild tire cleaner, water, and a soft or moderately firm brush. Remove brake dust and road film regularly so staining does not become difficult to correct.

Avoid harsh solvents, petroleum products, aggressive abrasives, and excessive scrubbing that can damage the rubber surface or surrounding black sidewall. Rinse thoroughly and inspect the lettering for cracking or deterioration. White-letter appearance may change with use, but cosmetic discoloration should be distinguished from structural sidewall damage that requires professional evaluation.

Store the Goodyear Speedway 350 E70-15 in a cool, dry, shaded area away from sunlight, heat sources, ozone-producing equipment, petroleum products, and harsh chemicals. Mounted vehicles should maintain suitable pressure and avoid long periods of loading on one tread area when practical.

Tread depth alone does not determine continued serviceability. Inspect for sidewall cracking, flat spotting, casing distortion, discoloration, bulges, bead damage, and unexplained pressure loss. Record tire age and installation history. A qualified tire professional should evaluate any questionable condition before the vehicle returns to highway use.