The other major factor controlling the cornering speed of the cars is the design of the tyres. From to , the tyres in Formula One were not "slicks" (tyres with no tread pattern) as in most other circuit racing series. Instead, each tyre had four large circumferential grooves on its surface designed to limit the cornering speed of the cars. Slick tyres returned to Formula One in the season. Suspension is double wishbone or multilink front and rear, with pushrod operated springs and dampers on the chassis – one exception being that of the 2009 specification Red Bull Racing car (RB5) which used pullrod suspension at the rear, the first car to do so since the Minardi PS01 in 2001. Ferrari used a pullrod suspension at both the front and rear in their car. Both Ferrari (F138) and McLaren (MP4-28) of the 2013 season used a pullrod suspension at both the front and the rear.