rollbar

Brooks, like many rivals, long addressed this by putting firmer wedges on the medial side of many shoes’ midsoles, using a “progressive diagonal rollbar” on its flagship Adrenaline.

“GuideRails works better for that severe foot movement that causes knee torque than the rollbar did. GuideRails is a better system for running.”

Whether it would have helped Bianchi, whose car had the rear rollbar ripped off in the impact with the tractor and who appears to have suffered extreme G forces, remained an open question.

In Singapore we had the gearbox failure, at Suzuka a rear rollbar malfunction, before qualifying and in the race, and in Korea a rear rollbar failure.

Hamilton's car had suffered a rear rollbar failure that destroyed its balance and ability to conserve its rubber.