Coming as a back-to-back race from Canada, Indianapolis presents a very similar set of demands for the engineers as Montreal. Thus, the lack of testing time and comparable set-up demands meant that few developments were on the cars for this race.
In addition to the Canadian rear wing and mounts, McLaren dropped the usual wing over the rear light © XPB/LAT
Indianapolis's layout is split between the slow infield section from turn one to turn 11. From there, the race track passes out onto the oval and its main straight for a 28s flat-out blast.
While the infield section demands downforce and mechanical grip, the lap time is dominated by the long run around the oval. This means that the car's set-up is favoured towards lower drag for speed along the straight. This compromise in the set-up makes the cars tricky to manage around the slower corners.