While it might seem like a simple cost-cutting move, there are several reasons why the spare tire has slowly disappeared from new cars. Automakers Are Trying To Reduce WeightOne of the biggest reasons automakers are eliminating spare tires is weight. A full-size spare tire, wheel, jack, and lug wrench can add anywhere from 30 to 60 pounds to a vehicle. Drivers Aren’t Exactly Happy About Losing The Spare TireWhile automakers have their reasons for removing spare tires, many drivers aren’t convinced the trade-off is worth it. For many everyday cars and crossovers, though, the spare tire has become another piece of automotive history that is slowly disappearing.