Protect yourself from flats with Bontrager Thorn Resistant tubes. Asymmetric design uses thicker rubber on the tread side and thinner rubber elsewhere, which saves weight while maximizing puncture protection.

• 4.1mm thickness (tread side)
• Asymmetric extrusion puts extra rubber along tire sidewall and tread zones
• 100% inspected for guaranteed quality
• Purchase 20 tubes to receive a full case