Roof mounted spare tires look cool, however, they obviously are not for everyone. Being a 62 year-old man, the thought of wrestling a 80,90, or 100 lb. tire up onto or off of a vehicle's roof is not a pleasant thought. What about the change in the center of gravity of the vehicle? I've seen lots of guys puting spare tires, gas cans, and God only knows what else on their roofs. I doubt if any of these people ever thought of what might happen in an off-camber situation. Just my humble opinion but not for me, thanks.