Heavy Duty Tube 450/510-18 Tr-4 Valve Stem

Features:

• T3 (Tapered Tube Technology) Technology offers variable tube thickness to keep weight down and put strength where you need it
• Less unsprung weight and better cooling
• The latest in tube technology
• Built with a high grade synthetic and natural rubber blend
• Heavy 2.5mm outer thickness tapers to a thinner, lighter 1.75mm thickness against the rim