Pneumatic tyre designed to run when deflated has self-supporting side walls reinforced by inserts of rigid rubber composition in zones

摘要

The tyre, having a carcass reinforcing structure (10) anchored in its two beads, inner (61) and outer (62) side walls and a tread (70), has its side walls additionally reinforced by inserts (31) of a rigid rubber composition that allows the tyre to support a load corresponding to part of a vehicle with a substantially reduced or zero inflation pressure. The inner side wall is made with a substantially higher modulus than the outer one, and their inserts are sub-divided into an unequal number of zones (33, 34, 35), with the inner insert having more zones than the outer one.