I mounted my Range Rover Classic spare wheel on the bonnet, with the help of a Land Rover LWB station-wagon fitting.
I ran a heavy duty 'Dexion' shelving bar underneath to support it.
The system worked well, it was strong and I travelled from Sahara to Scotland and back, all of it off-road.
It cut down visibility a bit (ask that turkey that I ran over...) but basically it WORKED.
I also mounted two spares on a heavy duty chassis-mounted bull bar on another trip - but the top mounting broke on the washboard corrugations coming out of Djanet, and I had to do some serious nut and bolt work through the body shell to secure it again.
Click here (and scroll well down) to see the double spare tyre mounting arrangement.
Picture of the single bonnet-mounted arrangement will follow.
[This message has been edited by kitmax (edited 03 April 2006).]