Pulley spacer is set up for a one inch bore with a .125" keyway and designed to be used where two 1.00" wide drive pulleys were on a drive mandrel. This allows the racer to delete two drive pulleys making the stack come up correctly on the drive mandrel for other accessories to have proper belt alignment.
RBS has four of these so buy one or buy them all and save!!!!!!!!!!
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.