The DTM sporting regulations allow teams to use four tyre sets per weekend (five for new entries), with a stipulation in article 35.2.b that three of these may only be used across the two 20-minute qualifying sessions and races.
With a mandatory mid-race tyre change in both races, pitstop strategies tend to converge early in the pit window to keep the starting set for later in the weekend – rather than running something close to a 50:50 split.
