Pirelli says it has concerns that the mule cars being used to test Formula 1's 2017 tires fall short of the required amount of downforce by around 20 percent.Mercedes, Ferrari and Red Bull are working with Pirelli to develop next year's wider tires, using modified 2015 cars aimed at simulating...

Tony Kanaan and JR Hildebrand spent Thursday at Mid-Ohio helping the Verizon IndyCar Series to explore possible directions for its next aero kit, and according to the series, the exercise was a success."We've had two cars out there testing, tried running without the rear wheel guards, we've tried running with...