Shop › Standard Steel 1-1/4″ Wall Axles – Black Oxide Finish Image 1 of 1 Standard Steel 1-1/4″ Wall Axles – Black Oxide Finish $79.70 1-1/4″ diameter x 3/16″ steel axles. Black Oxide finish. Size: 32.5 34 35 36 38 40 Add To Cart Added! 1-1/4″ diameter x 3/16″ steel axles. Black Oxide finish.