Upgraded Solid Rubber TireThe solid rubber tyre is an optional extra. Some owners like to replace the rear tyre with this solid tyre to avoid punctures. However, it will provide a slightly harder ride. This tire is more flexible and soft than the previous solid tire. Features Lightweight and durable, moderate elasticity and no need to repair. Its texture is polymeric material which from micro pore foaming technology. We guarantee the flexibility and buffer capacity of it so