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Manufactured with a thermoplastic elastomer, called TPU. These tubes are lighter, and more robust than traditional butyl rubber inner tubes

• At a featherweight 23g the super-compact (when rolled up) S-Tubo Road stands out with very low rolling resistance which outpaces standard rubber tubes yet is comparable to latex tubes
  
• With 78% smaller packed size and the same puncture resistance as standard tubes the S-Tubo Road is the perfect choice as a spare and can be the crucial factor when you’re riding long and hard
  
• Specifically made for disc brakes (not suitable for rim brakes)
  
• Labeled Size: 700 x 18-28
  
• Shaft Type: Smooth
  
• Tube Compound: Thermoplastic Elastomer
  
• ISO Diameter: 622 / Road / 700c
  
• Valve: Presta - choose; 42mm, 60mm, or 80mm
  
• Weight: 23g.