Set of 2 Ultralight TPU Mountain Bike Inner Tubes 29"

• 29" MTB/Road Bike Compatible Universal Fit - Compatible with 29 x 1.9-2.5" tires & Presta valves (45mm).Compatible with French Presta valves for smooth adaptation to mountain bikes.The perfect choice for various bicycle usage scenarios • Ultra-lightweight design 63g/tube (70% lighter than conventional) - Only 63g per tube (compared to conventional butyl tube 160g+).Two pieces reduce rotational weight by 200g.Ideal for competitive riders with improved acceleration performance and hill climbing efficiency • Impact resistance Puncture-less design - 0.3mm reinforced TPU construction provides 3 times more pressure resistance (up to 150 PSI/approximately 10.3 bar) and 5 times more impact resistance than conventional products.Will not deteriorate even in oil/water wet environment • Low rolling resistance = professional speed - 0.3mm ultra-thin wall design (previously 0.8mm) minimizes tire friction.Confirmed speed improvement of 1.5-2.2% in laboratory tests.Revolutionizing racing and endurance riding • Completely reliable support in Japan - 12-month warranty + 24-hour professional technical consultation.Defective products will be shipped free of charge within 48 hours (no returns required).Rapid response from bases in Japan