Wheel rims used by Mercedes, whose legality had been questioned by rival teams, have been given the green light by the stewards in Mexico. The (rear) rims on the Silver Arrows feature a spacer which has grooves and holes aimed at reducing the heat flow across the rear axle. However, rival teams have suggested that this, in contravention of the regulations which state that 'any specific part of the car influencing its aerodynamic performance must remain immobile in relation to the sprung part of the car' - do indeed give an aerodynamic benefit. With Mercedes, fearing a protest from rivals, calling on the Mexico City stewards to rule on the rims ahead of the race weekend, the stewards...
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