No, the tires do not lift off the ground. The tag axle pressure is reduced to zero, hopefully, and then most of the rear weight is shifted onto the drive axle. The tag tires must still support the weight of the tag tires and wheels and the tag axle itself. Many threads on TRVN network discuss this.
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Kent & Sue & Belle
2019 Allegro Bus 45OPP Lovin' it
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