Lifeline MTB Inner Tube 1.75-2.5inch 48mm Designed for Mountain bikes. Crafted from durable rubber for long-lasting performance, it handles demanding trails while providing a dependable seal and long-lasting durability. Whether you're riding rocky paths or forest trails, it provides consistent performance in every adventure. This LifeLine inner tube is perfect for keeping in a saddlebag or workshop for any serious mountain biker, ensuring you're always ready for the unexpected. Specifications: Presta Valve: 48mm. Compatible Rim Sizes: 26 inch, 27 inch, and 29 inch. Width: 1.75-2.5 inch / 47-62mm. Inner diameter: 559mm.