Kate, do you not think that the extra weight of a spare wheel is fully justified? If you are unfortunate enough to have a punture, it could save you a lot of time and expence for the extra weight of approx 20Kgs. As with the car, I wouldnt leave without a spare in good condition. Throw out the Microwave or something else you only use occasionaly.Yes, without exception, everything you load on board the caravan has to come out of the weight allowance.