Section Trans 305.31 - Modifications affecting height of a vehicle(1) Modifications authorized by s. 347.455, Stats., may not cause the front or rear bumper height of any vehicle to be altered more than the distance allowed by s. 347.455, Stats., from the original height of the bumper as specified by the vehicle manufacturer. Four wheel drive vehicles and motor trucks with a gross weight of not more than 8,000 pounds may not be modified so as to cause the vehicles to ride more than a total of 9 inches above the height of the vehicles specified by the manufacturer combining alterations under s. 347.455(2), Stats., and changes in tire size under s. 347.455(3), Stats. In the absence of manufacturer's specifications, every bumper shall meet the height standards established by s. Trans 305.18(2) (a).(2) Changes in the height of a vehicle shall be measured from the level surface on which the vehicle stands to any part of the vehicle. When measuring to a part of the vehicle body, consideration shall be given to specific modifications allowed by s. Trans 305.21(3) in addition to alterations allowed by s. 347.455, Stats.(3) The manufacturer's specified height of any part of a vehicle may be determined from the data published by the manufacturer or other manufacturer publications, such as the owner's manual, or by comparison with a similar model vehicle as normally delivered by the manufacturer.(4) No person may operate any vehicle which has a fixed part of the vehicle located in a position that would contact the road surface before the rim in the event of tire failure.Wis. Admin. Code Department of Transportation Trans 305.31
Cr. Register, February, 1996, No. 482, eff. 3-1-96; am. (4), Register, October, 1997, No. 502, eff. 11-1-97.