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Turning Diameter

What happens to your turning diameter once Quigley install your Independent Front Suspension (IFS) 4×4 system? Nothing, your turning diameter remains the same as the 2-wheel drive OEM GM vans. 

The diagram below shows you how a turning diameter is calculated and corresponding table shows you the comparison between our 4×4 IFS system and GM’s OEM 2-wheel drive. The left turning diameter and the right turning diameter are not always the same; therefore you must calculate it as an average of the 2 turns.

GM Turning Diameter Specs

Models Wheelbase Turning Diameter (ft.)
Quigley 4×4 Curb-to-Curb GM Curb-to-Curb
G-2500 135″ 49.2 ft. 49.2 ft.
G-2500 155″ 54.5 ft. 54.5 ft.
G-3500 135″ 49.2 ft. 49.2 ft.
G-3500 155″ 54.5 ft. 54.5 ft.


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