Size: 26 x 1 3/8 inches
ISO Diameter: 590 mm (designed for ISO 590 rims, a common size on vintage and touring bicycles)
Tread Pattern: HF-156A
Slick road-touring tread for enhanced efficiency on paved surfaces.
Pressure Rating: 60 PSI (optimum pressure for smooth and fast rides)
Bead Material: Wire bead for durability and secure rim fit.
Style: Standard touring tire.
Sidewall: Black/Black for a classic, understated appearance.
Brand: ALTA (renowned for dependable, budget-friendly bicycle components)
Fits:
Rims with ISO 590 mm diameter.
Commonly found on:
Vintage road bikes (e.g., Raleigh Sports, Hercules, and similar British or Japanese models)
Touring bicycles
Utility and commuter bikes with standard 26 x 1-3/8 rims.
Perfect for cyclists restoring or maintaining older bicycles with non-Schwinn rims.
NOT Compatible:
Schwinn S7 Rims:
Schwinn S7 rims use a unique ISO 597 mm standard, requiring tires labeled 26 x 1-3/4.
The ISO 590 ALTA tire is smaller and will not fit Schwinn S7 rims properly.
Modern 26-inch Rims:
Modern 26-inch rims generally have an ISO 559 mm diameter and require differently sized tires.
Design and Application:
Ideal for paved roads, light touring, and city commutes.
Slick tread reduces rolling resistance, improving speed and efficiency.
Recommended for vintage and classic bicycles.
Durability:
Wire bead construction ensures a secure fit and extended lifespan.
Suitable for frequent road use with moderate protection against wear and punctures.
Performance:
Optimized for smooth surfaces.
High PSI rating (60 PSI) provides a balance of speed and comfort.
Inflation: Use a pump with a pressure gauge to inflate to the recommended 60 PSI for maximum performance.
Inner Tube Compatibility: Requires inner tubes compatible with 26 x 1-3/8 (ISO 590).
Riding Conditions: Designed for paved roads, ideal for commuting or casual touring.
Confirm rim compatibility (ISO 590 mm diameter).
Check the tread direction (indicated by an arrow on the sidewall).
Gradually inflate the tire while ensuring the bead seats evenly around the rim.
ISO Size Difference:
The ALTA tire is built to fit rims with an ISO 590 mm diameter.
Schwinn S7 rims require tires with an ISO 597 mm diameter, which are slightly larger and will not seat properly with the ISO 590 ALTA tire.
Tire Labeling Confusion:
Schwinn introduced proprietary sizing (like 26 x 1-3/4) that deviates from standard international measurements.
While the size labeling might appear similar (26-inch), the actual rim diameters differ, causing compatibility issues.