7. Steering gear ratio
• Steering gear ratio is given by x:1
This ratio means in x degree rotation of steering wheel will turn by 1 degree
• For Heavy vehicle : 20:1
• For motor car : 12:1
Normally wheels turn by 60 to 80 degree while steering
• 20 * 60 degrees = 1,200 degrees, or about three full revolutions
(360 degrees = 1 full turn) of the steering wheel
• 20 * 80 degrees = 1,600 degrees, or over four revolutions of the steering
wheel