Sunlite Inner Tube – 26 × 1-3/8 | 32 mm Schrader Valve
This Sunlite inner tube is a correct replacement for bicycles using 26 × 1-3/8 tires with ISO 590 rims and a Schrader valve.
Designed for older road, city, and utility bikes that use the 590 BSD standard, this tube provides a proper fit where common 26" MTB tubes (ISO 559) will not. The straight, smooth Schrader valve allows easy inflation with standard floor pumps and air compressors.
Key Features
• Correct fit for 26 × 1-3/8 tires using ISO 590 rims
• Schrader valve compatible with standard pumps
• Straight, smooth valve stem for easy inflation
• Removable valve core for service and replacement
• Suitable for everyday road and utility riding
Technical Details
• Wheel Size: 26 inch
• Tire Size: 26 × 1-3/8
• ISO (BSD): 590
• Valve Type: Schrader
• Valve Length: 32 mm
• Valve Angle: 0° (straight)
• Valve Stem: Smooth
• Valve Core: Removable
• Wall Thickness: 0.9 mm
• Flat Fold Width: 33 mm
Important Compatibility Note
This tube is for ISO 590 (26 × 1-3/8) wheels only and is not compatible with 26" mountain bike wheels (ISO 559). Always verify tire sidewall markings before purchase to avoid fit issues.