image tag: pinion, orientation: vertical, image quantity: 4

1836x3264px

rail, train, rack and pinion, railway, mountain, alps, switzerland
3000x4000px

france, colmar, alsace, pinion, figurine, stud
3072x4608px

machine, gear, mechanics, old, mechanism, pinion, heritage
3840x5760px

road bike, wheel, bike, cycling, design, urban, racing