The Oza SA2 high-quality inner tube is particularly lightweight, with a wall thickness of only 0.6 mm, it is specially designed for performance-oriented riders or for light mountings. Premium Butyl design guarantees performance, reliability and resistance to drilling. Made in Europe. // Size: 29 x 1.90 - 2.30 // Valve: Presta, 47 mm // Weight: 150 g Made in Europe 100% premium reinforced butyl. We do not compromise the quality of the materials. That's why our inner tube is made of an elastic and airtight butyl rubber. Thanks to its high air retention capacity, there is virtually no loss of pressure. Reliable and perfect for riders. We offer you a 2-year mobility guarantee on our bicycle inner tubes. If the inner tube is defective or not waterproof, we will replace it for free! Damage caused by third parties, e.g. by glass, nails, chips or pinching, are excluded. 47mm Presta Valve The first class Presta valve in our inner tube ensures high air tightness and easy inflation. It can be inflated with all standard foot pumps, mini pumps, hand pumps or CO2 cartridge pumps.