Sunlite Inner Tube – 20 × 1-3/8 (451 × 32) | 32 mm Presta Valve
This Sunlite inner tube is designed for 20-inch wheels using the 451 BSD standard and a Presta valve, providing a correct replacement for performance-oriented small-wheel bikes.
Built to fit ISO 451 rims, this tube is commonly used on folding bikes, recumbents, and select performance BMX or road-style small-wheel applications where accurate sizing is critical. The threaded Presta valve allows secure pump attachment and precise inflation control.
Key Features
• Designed specifically for ISO 451 (20 × 1-3/8) wheels
• Presta valve for performance and high-pressure applications
• Threaded valve stem for secure pump engagement
• Removable valve core for service or replacement
• Suitable for everyday riding and performance small-wheel setups
Technical Details
• Wheel Size: 20 inch
• Tire Compatibility: 20 × 1-3/8 (451 × 32)
• ISO (BSD): 451
• Valve Type: Presta
• Valve Length: 32 mm
• Valve Angle: 0° (straight)
• Valve Stem: Threaded
• Valve Core: Removable
• Wall Thickness: 0.9 mm
• Flat Fold Width: 33 mm
Compatibility Note
This tube fits ISO 451 wheels only and is not interchangeable with ISO 406 (standard 20") wheels. Always confirm the ISO number printed on the tire sidewall before purchase to ensure proper fit.