Trans 305.46 HistoryHistory: Cr. Register, February, 1996, No. 482, eff. 3-1-96. Trans 305.47Trans 305.47 Tires, wheels and rims. The tires of every motorcycle and of any attached sidecar or trailer shall meet the requirements of s. Trans 305.30. Trans 305.47 HistoryHistory: Cr. Register, February, 1996, No. 482, eff. 3-1-96. Trans 305.48Trans 305.48 Definitions. For purposes of this subchapter, “vehicle” means heavy trucks, trailers and semitrailers. Trans 305.48 HistoryHistory: Cr. Register, February, 1996, No. 482, eff. 3-1-96. Trans 305.485(1)(1) The following sections of subch. II apply to heavy trucks, trailers and semitrailers: Trans 305.485 HistoryHistory: Cr. Register, February, 1996, No. 482, eff. 3-1-96; am. (2) (a), renum. (2) (b) to (e) to be (2) (f), (g), (i) and (j), cr. (2) (b) to (e) and (h), Register, October, 1997, No. 502, eff. 11-1-97. Trans 305.49(1)(1) When a vehicle is equipped with an axle or axles that raises or lowers by means of air pressure, spring force or hydraulic pressure, the control valves shall be installed as follows: Trans 305.49(1)(a)(a) The control valve that regulates the amount of pressure shall be mounted outside of the driver’s compartment. Trans 305.49(1)(b)(b) The control valve that regulates the movement of the axle or axles so as to raise or lower the axle or axles may be in the driver’s compartment. Trans 305.49(2)(2) This section applies to vehicles manufactured commencing with the 1998 model year. Trans 305.49 HistoryHistory: Cr. Register, February, 1996, No. 482, eff. 3-1-96; am. (2), Register, October, 1997, No. 502, eff. 11-1-97. Trans 305.50Trans 305.50 Bed and body on trailers and semitrailers. The bed or body of a trailer or semitrailer may not contain holes, cracks or other openings which would allow the vehicle contents to drop, leak or spill upon the highway.