Duro PT (Puncture Technology) has even more puncture resistance by incorporating a PT Puncture Breaker under the tread. The super strong Panaracer 3D casing means that the Duro retains all the sidewall strength but with extra resistance against penetration flats. New ZSG Dual Rubber Compound & All Contact tread shape make this the tyre of choice when the road gets rough. 230g (23c) Available in 23 or 25C. 230g/260g.