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.

Product details

1. 4.1mm thickness (tread side)
2. Asymmetric extrusion puts extra rubber along tire sidewall and tread zones
3. 100% inspected for guaranteed quality

   Size					20" x 1.9-2.125", 35mm
   Diameter					20"
   Width					1.9-2.125"
   Length					35mm
   Valve					Schrader
   ETRTO					48/54-406
   Weight					455g