 At March Engineering in Bicester, designer Robin Herd had watched the P34 experiment closely and, by late 1976, had come to the conclusion that the 'four front wheels' concept might have been a blind alley.In his assessment, the improved aerodynamics at the front were largely negated by the rear tyres which at 24" (60 cm) diameter would still have accounted for 30 to 40% of the car's total drag.He also felt that with a modern rear wheel drive F1 car, the extra grip could be employed more usefully for the driven wheels.