Answer: axles

AnswerCrossword Clue
AXLESTurnpike toll count
AXLESAuto pair
axlesAXLE, a shaft upon which a wheel revolves
axlesshaft on which a wheel rotates
AXLESHighway tolls may be based on the number of them
AXLESToll units for semis
AXLESCouple on the road?
AXLESThey get the wheels turning
AXLESCar pair
AXLESSemi shafts
AXLESThey help keep the wheels turning
AXLESEighteen-wheeler's bunch
AXLESVehicular bars
AXLESTurnpike toll determinants
AXLESConnections for big wheels
AXLESAssembly line supply
AXLESWheel parts
AXLESBearing bearers
AXLESLinchpins' places
AXLESWheels turn on them
AXLESHighway toll units
AXLESWheelbase parts.
AXLESWheel spindles.
AXLESChassis parts
AXLESAuto parts
AXLESChassis items
AXLESCar parts
AXLESParts of carts
AXLESParts of wheels
AXLESBike parts
AXLESThey keep the wheels turning
AXLESBars on wheels
AXLESCars' bars
AXLESSome toll units
AXLESConnections for car wheels
AXLESCar rods
AXLESOnes keeping the wheels turning?
AXLESTrucker's toll factor
AXLESWeigh station count
AXLESCar shafts