Sauber unpacks mystery behind Nico Hulkenberg's plank wear disqualification

The Sauber Formula 1 team is still searching for answers over Nico Hulkenberg's Bahrain Grand Prix disqualification.
Hulkenberg crossed the finish in 13th after a tough evening trying to contend for points, but was disqualified because his skid plank had been ground down to 8.4mm, below the minimum thickness of 9mm.
It is the second time this season a car has been thrown out of the results ...Keep reading