TEG

The roadster is trying to be a balanced vehicle that give excellent steering feel, excellent directional change stability (quick through a slalom), high efficiency, etc. Wider tires would help with some attributes, but would detract from others. Would you trade a little bit of dry traction in exchange for making the range shorter, steering harder, and less compliance over bumps? As they said on their blog they are resisting the temptation. Yes, F1 cars tend to have wide tires, but they replace them frequently, they are hard to steer, and comfort isn't a priority.