BOISE - Nearly one-third of 2017 model year vehicles do not have a spare tire as standard equipment, according to the American Automobile Association. "It was kind of shocking to all of us,” said Jim Sterk, general manager of Lithia Ford in Boise. “Even here at the dealership we were like 'Oh where's the spare? '”No spare tire is a new trend in cars. It’s an effort to reduce weight, which improves fuel economy, and provides more space.