Repair Manual Supplement : Vehicle Pulling to One Side Suspension

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2002-2009 4Runner, Avalon, Camry, Corolla, Highlander, Land Cruiser, Prius, RAV4, Sequoia, Sienna, Solar a, Tacoma, Tundra 2007-2009 Camry HV, FJ Cruiser 2002-2005 Celica, Echo, MR2 Spyder 2006-2009 Highlander HV 2003-2009 Matrix 2009 Venza 2004-2009 Yaris When radial tires are rotating, they have the characteristic of generating force in the lateral direction between the tire and the road surface. This lateral force is comprised of two factors: •Ply-steer, which changes direction according to the rotation direction of the tires. •Conicity, which is generated inafixed direction regardless of the tire rotation direction. If these lateral forces are too strong, vehicle pulling will occur. A. Ply-Steer Lateral force due to ply-steer is produced by the construction of the belts inside the tire tread. With radial tires, the wire of the belt is slanted as shown in the illustration below. Thus, it is in the lateral direction that tire tread easily changes shape (stretches), and lateral force is generated between the tire and the road surface in the lateral direction