Mexico City - Mexican Grand Prix stewards have cleared Mercedes to use a novel rear wheel rim design whose legality had been questioned by Formula One rivals concerned it might give an aerodynamic benefit.
The stewards gave their opinion in a statement issued after Mercedes made a written request for them to settle the matter ahead of Sunday's potentially title-deciding race.
Lewis Hamilton is poised to win his fifth championship in Mexico, needing only to finish seventh for Mercedes while Ferrari rival Sebastian Vettel must win to have any lingering chance.
Hamilton has won nine races this season, his run of four in succession ending at last weekend's US Grand Prix in Austin, Texas, when Mercedes did not use that particular type of rim.
The wheel rim controversy concerns spacers, small holes and grooves that Mercedes says are for cooling purposes.