The alloy rack does not have any spacers,the steel rack has spacers about 35mm long, I just stacked some 8x25mm OD washers to the correct height and then stuck them together with plastic metal to stop them flying around during assembly,you will need to put a smaller washer at the bottom of the stack to get it to sit correctly on the sub frame, I did consider boring out some old bar ends as they are about the right size.