The pre-production wooden-spoke wheels were replaced beginning in 1936 with more durable light-metal cast wheel discs and removable tires that made the howitzer easier to tow. The motorized version was fitted with wider solid-rubber tires. A combination of wooden wheels and rubber tires was a frequent occurrence. Towards the end of the war, even older wooden wheels from the leFH 16 were used. The howitzer was designed from the start to be transported either by horse or motor vehicle. The heavy weight made horse-drawn transport difficult, especially in the mud and snow of the Eastern Front. The motorized version was attached directly without a limber to either a Sd.Kfz. 6 or Sd.Kfz. 11 prime mover and could easily achieve a march speed of 40 km/h, equivalent to a day's march by a horse-drawn battery. Although the Sd.Kfz. 6 was intended as the primary motor transport for the howitzer, the lighter Sd.Kfz. 11 could also achieve the same task. A motorized leFH 18 battery had a radius of action 10 times greater than a horse-drawn one and required 49 fewer personnel.