Vehicle turn-in is the transition between forward motion and a turn — the nature of which varies considerably from vehicle to vehicle when the driver turns the steering wheel.

A vehicle’s turn-in may be gradual or rapid — the latter is often preferred by driving enthusiasts, especially in sporty vehicles. Understand that turn-in is not solely a reflection of the steering ratio, which is the amount the front wheels turn in response to a given degree of rotation of the steering wheel. A vehicle can have quick-ratio steering and still exhibit gradual turn-in. To oversimplify a bit, a vehicle with “crisp” turn-in reacts rapidly, getting you well into the turn with minimal rotation of the steering wheel beyond its center position.

A vehicle’s turn-in response is no accident. Engineers tailor it to match the experience to the character of the car. Safety is a major factor as well: Gradual turn-in is the norm in sport utility vehicles, which typically have a high center of gravity and a greater propensity to roll. Sharp turn-in could make this hazard even more likely.

Information for this was taken from the Cars.com’s glossary, written by Joe Wiesenfelder.

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Answered by Joe Bruzek on September 29, 2008 in Glossary | Permalink

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