Thorn Resistant

Information from: http://bontrager.com/model/00951.

Protect yourself from flats with Bontrager Thorn Resistant tubes. Asymmetric design uses thicker rubber on the thread side and thinner rubber elsewhere, which saves weight without lessening puncture protection. 4.1mm wall thickness (tread side).

Features

Asymmetric extrusion puts the extra rubber only where it's needed - along the tire sidewall and tread zones

4.1mm wall thickness (tread side)