You can never have enough spare tyres. This was something we learnt very quickly as we drew closer to the end of our some 5500 km journey across Namibia. As we were making our way out of one of the most spectacular and rugged landscapes, an ancient and now dry riverbed near Skeleton Coast, we blew a tyre. After spending some time searching for a way to access the spare tyre (a tiny keyhole at the back of the bumper), our luggage and bodies became coated in a fine layer of desert sand.