Ferrari has identified the cause of Sebastian Vettel's high-speed crash during the second day of pre-season testing in Barcelona.
Vettel was starting to perform a quick lap shortly after a red flag period on Wednesday morning when a mechanical breakdown occurred as he turned around for Turn 3. The car immediately melted and went straight into the Tecpro barrier on the outside of the circuit, causing 40 minute delay as the car was removed and the barrier repaired.
Ferrari spent most of the day repairing the damaged car and investigating the cause. On Thursday morning, he confirmed responsibility for the rim problem.
"After thorough checks, we found that Seb's departure yesterday was due to a rim problem," said a Ferrari spokesman. "The rim had been damaged a few seconds earlier by an impact with a foreign object."
The incident led Charles Leclerc to perform a solo tour at the end of the second day of racing, which led Ferrari to adapt its range of drivers to the rest of the test. Having already split the two drivers in the first two days, Ferrari will run Thursday all day at Leclerc before Vettel finishes the test Friday.