Sunlite Presta Valve Tube

This tube is designed to fit 650B (27.5-inch) tires ranging from 2.10 to 2.35 inches in width, and 29-inch tires ranging from 1.90 to 2.30 inches in width. Please check the sidewall of your current tire to ensure your specific size falls within these ranges.

The removable valve core allows you to easily inject tire sealant directly into the tube to help prevent flats. It also makes it simple to replace a damaged valve core without needing to swap out the entire tube.

A 48mm stem is a standard length that works well with most mountain and hybrid bike rims. If you have deep-section aerodynamic rims, you may need a longer valve extender, but for standard recreational and mountain bike wheels, this length provides plenty of clearance for your pump head.

The threading on the valve stem allows you to securely lock your pump head onto the valve, preventing it from slipping off while you inflate your tire. It also helps keep the valve stem stable within the rim hole, reducing the risk of movement while riding.

This tube is specifically engineered for mountain and sport comfort hybrid bikes with wider tires. It is likely too wide for standard road bike tires, which typically require much narrower tubes.