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Tri-axles with double wheels
Tandem axles with double wheels
Tandem axles with air suspension
Tri-axles with single wheels
Explanation: The type of suspension fitted to a vehicle will influence its resistance to 'roll-over'. Modern tri-axle semi-trailers fitted with single wheels on each side extend the tracking width available, making this the most stable configuration.
Category: Vehicle Weights and Dimensions
References: The Official DVSA Guide to Driving Goods Vehicles: Section 2
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