Tread Widths—Triples

Tread is measured between center of tires.

Approximate tread range for each tire size is shown in the following chart. Additional spacings can be obtained by slight adjustment of inner and dual wheels.

NOTE: See Observing Tread Width Limitations in this section.

Tire Size	Inner	Dual	Triple
18.4R46	1500 mm (59.0 in.)	2750 mm (108.4 in.)	4105 mm (161.7 in.)
480/80R46	1500 mm (59.0 in.)	2750 mm (108.4 in.)	4105 mm (161.7 in.)
20.8R42	1600 mm (63.0 in.)	2987 mm (117.6 in.)	4374 mm (172.2 in.)
520/85R42	1600 mm (63.0 in.)	2987 mm (117.6 in.)	4374 mm (172.2 in.)
480/80R50	1543 mm (60.8 in.)	2816 mm (110.9 in.)	4090 mm (161 in.)
520/85R46	1600 mm ( 63.0 in.)	2978 mm (117.2 in.)	4356 mm (171.5 in.)
Steering stops required on all triple tread