Calculate overall steering ratio from steering wheel turns, pinion gear, and knuckle arm geometry.
Input Parameters
Results
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Overall Steering Ratio
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Degrees Per SW Turn
°
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Approx Turn Radius
ft
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Relative Effort
Note: Typical ratios: Economy 14-18:1, Sport 12-14:1, Race 8-12:1. Variable-ratio racks provide quicker response at center with more mechanical advantage at lock.
Reference
Total SW Degrees = Lock-to-Lock x 360
Total Wheel Degrees = Max Angle x 2 (left + right)
Steering Ratio = SW Degrees / Wheel Degrees
Degrees Per Turn = Total Wheel Deg / Turns
Turn Radius = Wheelbase / tan(Max Angle)