Quick question - did you take an additional spare tyre for your 4x4 when travelling. We do have one and as we have not used it in several short trips (1 month each time) we are wondering do we need it as it is just extra weight to cart around, or should we sell.
Much lighter option is to carry a spare tyre, not the complete wheel. Then you can put it inside the car and pack the inside with all of your goodies. Only extra weight is something to fit the tyre onto the required rim. Also as an option, have a look at the correct size tube as well. This can give extra travel so long as the tyre itself is not to damaged.