12 - 18 mm spindle for Dirt Bike Tire Changer. 12 - 18 mm spindle for bikes with smaller hub bearing. The diameter of the spindle is 12 mm and it comes with a(n) 18 mm adapter (the original Rabaconda spindle diameter is 20 mm and adapter 24 mm). Axle material: Electro galvanized steel. Sleeve material: Anodized aluminum. 28 mm adapter for Dirt Bike Tire Changer. 28 mm adapter to slide over standard 20 mm Rabaconda center spindle. Keeps wheels with hub bearing diameter 28 mm and above centered. Rabaconda standard spindle diameter is 20 mm and 24 mm adapter comes with the tire changer. Sold individually. Standard Spindle for Dirt Bike Tire Changer. This is a replacement spare part - standard spindle that comes originally with the tire changer (diameter 20 mm). Sold individually. Note: Sleeve is NOT included.