During a NASCAR race , drivers do hundreds of laps at speeds of more than 300 kilometers per hour . NASCAR pit crews are key to a driver 's success . They're the ones who put their bodies on the line for you, and they do it with no safety gear or helmets. Head coach of the 48 pit crew at Hendrick Motorsports explains the art of pit crew .
NASCAR pit crews are key to a driver 's success . They're the ones who put their bodies on the line for you, and they do it with no safety gear or helmets. Head coach of the 48 pit crew at Hendrick Motorsports explains the art of pit crew .