The Michelin Inner Tube provides outstanding protection against punctures and pinch flats, and is the perfect choice for when the road gets tough. Features an overlap splice which is stronger than the butt splice used on most tubes. Splice is always placed opposite the valve stem to help balance the tube. Used by those who want the very best. Technical Specifications: Valve stem type: TR-4 (straight metal stem (8 mm diameter)). Tire size: 2.50-10.