I've read this debate with great interest as I too wondered why caravan manufacturers don't include this piece of kit with their products. What concerns me is this: With traffic conditions today, is it really safe to change a wheel, be it on a caravan or car, on todays busy roads? I think I'll leave it to the nice man from my motoring organisation to take care of it for me, that piece of plastic weighs a lot less than a jack and he has more experience and a big van with flashing lights to warn other road users!